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10 reasons to plant a tree this spring

MD Staff

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Did you know planting a tree is one of the easiest and most powerful things you can do to have a positive impact on the environment? It’s true. Trees clean the air, prevent rainwater runoff, help you save energy and even combat global warming. And they’re a snap to plant! No horticultural degree required. With Arbor Day just around the corner in April, there’s no better time to give Mother Nature a little TLC by planting a tree.

From the single homeowner in Nebraska planting a maple in her backyard to the 250 Comcast employees volunteering in communities devastated by hurricanes, fires and Emerald Ash Borer infestation by planting hundreds of trees on Comcast Cares Day (the nation’s largest single-day corporate volunteer event), people nationwide are getting their tree on this spring. Here are 10 reasons why you should join them.

Trees fight climate change

Wish you could do more than recycling and reducing your carbon footprint to combat climate change? Trees have you covered. Through photosynthesis, trees absorb harmful carbon dioxide, removing and storing the carbon and releasing oxygen back into the air.

Trees clean the air and help you breathe

Trees don’t just absorb CO2. They also absorb odors and pollutants like nitrogen oxides, ammonia, sulfur dioxide and ozone. It’s estimated that one tree can absorb nearly 10 pounds of polluted air each year and release 260 pounds of oxygen.

Trees prevent soil erosion and rainwater runoff

During heavy rains, water runoff finds its way to streams, lakes and wetlands, creating the potential for flooding. It also picks up and carries pollutants along the way. The EPA and the Center for Watershed Protection are recognizing the importance of trees in managing runoff. Leaf canopies help buffer the falling rain and their roots hold the soil in place, encouraging the water to seep into the ground rather than run off.

Planting trees is easy

Gardening can be intimidating for newbies because there are so many variables. Which plants and flowers should you put next to each other and which should you separate? Which bloom in the summer and which bloom in the fall? When you’re dealing with trees, there’s none of that. Just choose a spot in your yard and you’re good to go. Here’s a video showing you all you need to know about planting your young trees:

You’ll save money

Trees conserve energy in summer and winter, providing shade from the hot summer sun and shelter from cold winter winds. With trees standing between you and the elements, you’ll spend less on your energy bill to heat and cool your home.

Trees increase your home’s value

Studies of comparable homes with and without trees show that, if you have trees in your yard, your home’s value increases by up to 15 percent. It’s all about curb appeal, and trees make your home and yard more beautiful.

You’ll attract birds (and critters)

Trees provide nesting sites, food and shelter for your bird friends. Hang a feeder in one of the branches and enjoy the birdsong all year long. Squirrels love to make their homes in trees, too, and watching their antics is a great way to spend a lazy summer afternoon.

Trees are good for your mental and physical health

A view of trees in urban areas has been proven to reduce stress, anxiety and even the crime rate. Tree-filled gardens on hospital grounds speed healing in hospital patients.

You’ll be giving your descendants a gift

Trees can live hundreds of years, so when you plant one, you’re giving a gift to your children and grandchildren. It’s a symbol of your commitment to the environment and the beauty of the world around you that will live on far beyond your own lifetime.

Free trees!

Join the nonprofit Arbor Day Foundation for $10 and they’ll send you 10 trees selected for the region of the country where you live, at the right time to plant them. You’ll also get planting instructions and other information. The trees are guaranteed to grow or the Foundation will replace them.

An ancient Chinese proverb states: “The best time to plant a tree was 20 years ago. The second best time is now.”

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Green Planet

Building a Climate-Resilient South Asia

MD Staff

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Ms. Aisha Khan, Executive Director for Civil Society Coalition for Climate Change (CSCCC) and CEO of Mountain and Glacier Organization (MGPO) in Pakistan, Mr. Anand Patwardhan, Professor of Public Policy at the University of Maryland, USA, Ms. Idah Pswarayi-Riddihough, Country Director for Sri Lanka and the Maldives in the South Asia Region, World Bank Group

Last summer’s monsoon hit South Asia particularly hard and left nearly 1,400 people dead and displaced millions of others.

In the last sixty years, such weather extremes have become more common in the subcontinent and, without urgent action to limit carbon emissions, their impact on communities will likely get worse.

In addition to these extremes, average weather patterns are also changing with each year turning out to be warmer than the previous year and monsoon rainfall patterns are getting more and more erratic.

Eight hundred million South Asians to be exact – or half the region’s population—are at risk to see their standards of living and incomes decline as rising temperatures and more erratic rainfalls will cut down crop yields, make water more scare, and push more people away from their homes to seek safer places.

This worst-case scenario and relevant adaptation strategies underpin the upcoming report South Asia’s Hotspots, whose main findings were presented yesterday at a panel on building climate change resilience in South Asia at the World Bank Spring Meetings.

Its main author, World Bank Lead Economist Muthukumara Mani detailed how specific geographic areas across South Asia or “hotspots” which –until now—were relatively immune to climate change threats could be badly affected by 2050.

Most hotspots, Mani remarked, are located inland, already poor, have fewer roads and are isolated from main economic centers. And with many residents subsisting on farming, higher incidences of droughts or floods combined with extreme heat could further drive down their fragile wellbeing and force more people into poverty.

And while other manifestations of climate change such as sea level rise or natural disasters and their impact on economies have been well documented, less is known of the long-term effects of higher temperatures and unpredictable rainfalls on local communities.

It’s urgent to develop this understanding as most countries in South Asia have already passed their optimal temperature tipping points, beyond which standards of living and consumption are only expected to drop irreversibly.

To build resilience, the report recommends that South Asian countries better prioritize their financial resources where they’re most needed and target the most vulnerable individuals and families.

Mani noted that diversifying jobs beyond agriculture, investing in education and skills, and improving access to electricity can ease the expected decline in living standards caused by long-term climate impacts. Such actions, he argued, must be tailored to address the specific climate impacts and local conditions found in South Asia’s hotspots.

In the end, the cost of inaction—that is, if carbon emissions continue unabated—could be huge as countries with severe hotspots, Mani concluded, would see income in these areas drop by 14.4 percent in Bangladesh, 9.8 percent in India, and 10 percent in Sri Lanka by 2050.

Following the presentation, government, civil society, and academia elaborated on concrete climate actions and adaptation strategies to build a more resilient South Asia.

The panel included Ms. Mahmuda Begum, additional Secretary in World Bank Wing at Economic Relations Division at the Bangladesh’s Ministry of Finance, Ms. Aisha Khan, Executive Director for Civil Society Coalition for Climate Change (CSCCC) and CEO of Mountain and Glacier Organization (MGPO) in Pakistan, Mr. Anand Patwardhan,  Professor of Public Policy at the University of Maryland, USA, and Ms. Jaime Madrigano associate policy researcher at the RAND Corporation, USA. Ms. Idah Pswarayi-Riddihough, Country Director for Sri Lanka and the Maldives in the South Asia Region, World Bank Group moderated the discussion.

Noting that Pakistan’s soaring population coupled with shrinking arable lands present a challenge to the country’s environment sustainability and food security, Aisha Khan emphasized that building climate resilience should go hand in hand with better –that is, more open and inclusive—governance. Involving civil society, including women-run organizations, will bring greater accountability to climate change policies that will later impact the entire population. And that sense of co-ownership and shared responsibility, Khan added, is critical to civil society.

Such collaborations are key to building strategic climate resilience and, to be successful in the long term, should extend to partnership between countries. Water presents such an opportunity. “We in South Asia are the third pole…with the densest glaciers outside polar regions in the world,” she said. “Water being a common problem for all of us, we need to do more work together.”

When it was his turn to speak, Anand Patwardhan noted that the conversation about climate resilience would have to go beyond risks and be reframed around opportunities to further advance the development agenda. In India, large national programs such as Smart Cities or Swachh Bharat projects are two examples of how climate action can help achieve greater development outcomes. In South Asia, Patwardhan later remarked, a lot of infrastructure still needs to be put into place. There lies an opportunity to invest in natural infrastructure [that benefits both the economy and the environment] and ecosystem adaptation to advance resilience across the region.

World Bank

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New Satellite Animations of Earth Show How Quickly Humans Are Changing the Planet

MD Staff

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A new website that combines dramatic images from space with expert analysis of how humans are changing the planet will launch on World Earth Day (22 April).

EarthTime ties together diverse data layers to show the patterns and connections behind some of the major social and political trends of the past two decades – and how they are inscribed into fast-changing landscapes.

The platform has already been used in public outreach in schools and museums, and to inform world leaders at World Economic Forum events of major environmental and geoeconomic shifts, from air pollution to inequality. It uses images captured by NASA satellites since 1984.

The vision, and long-term goal, is to better inform everyone – including individuals, business heads and policy-makers – about the lives we lead, the decisions we make and the impact we have on the planet.

Nine expert analyses on global challenges will be launched on World Earth Day (22 April): deforestation, city growth, coral bleaching, fires at night, glaciers, renewables, sea-level rise, surface-water gain and loss and urban fragility. Other layers will be added in the months and years ahead. You can see them at www.earthtime.org.

EarthTime was developed by CREATE Lab (the Community Robotics, Education and Technology Empowerment Lab) at Carnegie Mellon University, in partnership with the World Economic Forum. It draws on the Forum’s network of experts to give analyses and to tell stories. Users will soon be able to create their own stories.

EarthTime uses more than 300 free, open-source, geospatial datasets – an unprecedented number for visualizations of this kind. Expert opinions make sense of the data and the connections between them allowing a layering of narratives (e.g., how did rise in the global demand for meat trigger deforestation, a major contributor to climate change?). These stories are combined with images from space captured by NASA satellites between 1984 and 2016.

Current datasets come from the World Bank, the UNHCR, NASA, Berkeley Earth, the Stockholm International Peace Research Institute, Climate Central, S&P Global, Kudelski, the International Renewable Energy Agency and WWF, to name a few. New data providers are being added constantly.

“EarthTime tries to build the common ground that we believe is essential to the discourse that we all must have as stewards of our planet and our joint future,” said Illah Nourbakhsh, Professor of Robotics, Carnegie Mellon University, and Director, CREATE Lab.

“The Earth is changing dramatically. No single discipline can make sense of all that is now happening and no citizen is free from the consequences of what we all do next. We all must be involved in understanding Earth’s changes and how we can work together to bring about our desired sustainable future into reality.”

Nourbakhsh also serves as a Global Future Council member at the World Economic Forum. His research focuses on human-robot collaboration.

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Green Planet

Human Footprint Devastating Wildlife: An Article For Earth Day

Dr. Arshad M. Khan

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Animals can be beautiful; they can be sleek, graceful, powerful, or just plain adorable, even cuddly.   A field of wild flowers chanced upon can take your breath away.  Wordsworth so moved by ‘a host of golden daffodils’ put pen to paper, and we are richer for his poem.  And tourists in their thousands visit coral reefs for their stunning beauty and sea life.  So it is distressing when scientists confirm our gut feelings about the human footprint on this natural environment.

Few people know that March 3 was World Wildlife Day, or this coming Sunday (April 22) is Earth Day — perhaps Trump sucking up all the media oxygen is responsible.  The fact remains, world wildlife is under serious threat, and in ways we can’t even imagine — not forgetting the eventual disaster due to climate change, unless the world wakes up.

Not so long ago Science, the voice of AAAS America’s largest science body, published three papers describing the harmful, even devastating, impact of modern human presence.

The first is a mammoth global study spanning the four major continents and New Zealand.  Authored by over one hundred scientists, it follows the movements of 57 mammalian species through the GPS-tracking of 803 individuals.  It finds a strong negative effect of the human footprint on animal movement.

The scientists develop a human footprint index (HFI) comprising multiple aspects of human influence:  built environment, croplands, pastures, nighttime lights, roads, waterways, railroads, population density, etc.  On the animal side, they note and separate the effects of resource availability and body mass on vagility (migration distances) — larger species travel further as do carnivores.

They then compute animal movement as the distance between subsequent GPS locations over nine time scales ranging from one hour to 10 days.  At each time scale and for each individual, they calculate the median (middle range) and longest distance movements. These procedures point to the thoroughness of their research.

Overall the findings indicate a decline in movement of mammals in high HFI areas ranging on average from one-half to one-third of their movement levels in areas without human presence.  For example, the median displacement of carnivores over the 10 day period in high HFI areas was only about half when compared to zero impact regions.  And the long distance movement over the same period in HFI areas was down to a third, averaging 6.6 km versus 21.5 km.  The impact on feeding and breeding then is clearly severe.

The authors note the consequences for ecosystem function globally, the effects being critical for wildlife conservation and also in the spread of disease.  In the latter aspect, the authors warn that “reduced vagility may go beyond ecosystem functioning to directly affect human well-being.”  In their understated words it means dangers of animal extinction and human epidemics.

Most of us always assume all bees are good.  Apparently not, as a couple of scientists explain.  So as we reach for that honey jar … ; it all depends on where it came from. That is the contention of the second piece which assesses the impact of managed honey bees on wild bees and other pollinators.

Pointing to the rapid global growth in managed bee colonies and the attention devoted to them, the authors believe this focus reduces efforts to preserve wild pollinators so necessary for wild plants and flowers.  In fact, high densities of such bees worsen the decline of these wild pollinators, and have also been linked to the spread of disease via shared wild flowers.  Long term this is a worsening threat to wild plants and flowers, many facing extinction.

The authors identify managed honeybees and their honey production and pollination of commercial crops as an agricultural issue, not an ecological one.  They advocate restriction of managed honey beehives in protected-ecological areas to reduce their harmful effects  noting that half of all European wild bees are threatened with extinction.

The theme for Earth Day is End Plastic Pollution.  If one ever wondered what can happen to a plastic bag discarded carelessly, the following research has a surprising and worrying answer.

This third Science article looks at plastic waste entering the oceans, often through catchment areas into rivers feeding into the ocean.  It assesses the influence of such waste on disease in reef-building corals.  The authors survey 159 coral reefs in the Asia-Pacific, a region containing 55.5 percent of global reefs and 73 percent of the human population living within 50 km of a coast — about a quarter billion people.

An estimated 4.8 to 12.7 million metric tons of plastic waste pollutes the oceans each year.  A model based on a high end figure of 8 million estimates that more than a quarter of this is pouring in from just 10 rivers, eight in Asia.  Of these the Yangtze alone dumps 1.5 million metric tons each year.  The river waste is a result of mismanagement and clearly can be reduced given resources and better waste collection and disposal practices.

In the oceans, microbes hitch a ride on the plastic, living longer and increasing their chances of landing on an unfortunate host.  The authors have measured plastic items per 100 square meters.  The count can vary from a low of 0.4 in Australia to a high of 25.6 in Indonesia.  Size of human population in coastal regions, good management or mismanagement of plastic waste disposal are all factors in the amount of waste entering the water.

The authors estimate 80 percent of marine plastic debris originates from land, thus offering a possibility of significant reduction through better waste management.  They develop a prediction model showing that by 2025 the waste will almost double in low-income countries like Myanmar but will edge up just 1 percent in Australia.  In total, they estimate a colossal 11.1 billion plastic items entangled on reefs across the Asia-Pacific region and expect the number to increase 40 percent by 2025 without stronger waste management intervention.

The study results are striking.  The likelihood of disease rises from 4 percent in areas free of plastic to an average of 89 percent when the coral has such debris.  Another issue is coral structural complexity which underpins micro-habitats for reef-reliant organisms.  Unfortunately, the study finds that plastic debris is up to 8 times more likely to affect reefs with greater structural complexity.  This lack of habitat can devastate fisheries through a drop in productivity by a factor of three.  Thus public awareness here could be a critical factor.

The parrots in the local pet store are almost always at risk.  It is human encroachment the owner tells us.  Forests are cut down, reducing habitat and food sources, and diminishing parrot populations.  Farmers plant crops in the cleared areas.  The parrots may or may not eat these but are perceived as a threat and often killed, further endangering them.

Once upon a time, millions of rhinos roamed across Africa and Asia; now about 30,000 survive, and many species are extinct or about to be.  Sudan, the last male northern white rhino lived at Ol Pejeta Conservancy in Kenya together with his daughter Najin and granddaughter Fatu.  He was 45, equivalent to 90 in human age, and quite infirm.  Earlier this year, when his condition deteriorated to the extent he was unable to stand, the vets decided to euthanize.  Hope lies with in vitro fertilization, and in the genetic material the vets collected from him.  At some future date, it might be possibly to use this to create an embryo with stem cell technology.

The engaging, lovable and cuddly koala is in danger from environmental effects.  its unusual diet of eucalyptus leaves carry a toxin it can usually handle, but increased CO2 levels reduce nutrition and eating more leads to ingesting more poison.  Add to this the Australian drought drying the leaves, leaving little moisture and resulting in kidney damage.

The human footprint also threatens the snow leopard, most closely related to the tiger not its namesake.  Ranging across the high mountain areas of central Asia, China and Mongolia, and revered in Kyrgyzstan, it has become a victim of human-wildlife conflict.  The herders whose livelihood depends on their sheep, goats and yaks do not take kindly to raiding snow leopards.  But their natural prey, the wild ungulates are suffering sharp declines due to competition with domestic herds.  Yet this animal is an example of what a concerted effort to save a species can accomplish.  Its status has been upgraded from ‘endangered’ to ‘vulnerable’.

Altogether, these studies and cases convey a stark warning.  They show that environmental degradation is the promise of a dismal future in which mammalian wildlife is scarce, wild pollinators and consequently wild flowers and plants are sparse, and beautiful coral reefs succumb to plastic waste-borne bacteria depleting reef-supported fisheries.  This is our legacy unless we take a step back to reassess human wants for their impact on the environment.

Author’s note:  A version of this article appeared in Common Dreams

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