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Nature: Humanity at a crossroads

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Despite encouraging progress in several areas, the natural world is suffering badly and getting worse. Eight transformative changes are, therefore, urgently needed to ensure human wellbeing and save the planet, the UN warns in a major report. 

The report comes as the COVID-19 pandemic challenges people to rethink their relationship with nature, and to consider the profound consequences to their own wellbeing and survival that can result from continued biodiversity loss and the degradation of ecosystems.

The Global Biodiversity Outlook 5 (GBO-5), published by the UN Convention on Biological Diversity (CBD), offers an authoritative overview of the state of nature. It is a final report card on progress against the 20 global biodiversity targets agreed in 2010 with a 2020 deadline, and offers lessons learned and best practices for getting on track.

“This flagship report underlines that ‘humanity stands at a crossroads with regard to the legacy we wish to leave to future generations,’” said CBD Executive Secretary, Elizabeth Maruma Mrema.

“Many good things are happening around the world and these should be celebrated and encouraged. Nevertheless, the rate of biodiversity loss is unprecedented in human history and pressures are intensifying. Earth’s living systems as a whole are being compromised. And the more humanity exploits nature in unsustainable ways and undermines its contributions to people, the more we undermine our own well-being, security and prosperity.”

“As nature degrades,” Ms. Mrema continued, “new opportunities emerge for the spread to humans and animals of devastating diseases like this year’s coronavirus. The window of time available is short, but the pandemic has also demonstrated that transformative changes are possible when they must be made.”

“The decisions and level of action we take now will have profound consequences — for good or ill — for all species, including ours.”

With respect to the Aichi Biodiversity Targets, set in 2010, the analysis based on the 6th set of national reports to the CBD and the latest scientific findings shows that seven of 60 “elements” — success criteria — within the 20 targets have been achieved and 38 show progress. In the case of 13 elements, no progress was made, or a move away from the target was indicated, and for two elements the level of progress is unknown. The report concludes that, overall, of the 20 targets, six of them (9, 11, 16, 17, 19 and 20) were partially achieved by the 2020 deadline.

“Now, we must accelerate and scale-up collaboration for nature-positive outcomes – conserving, restoring and using biodiversity fairly and sustainably. If we do not, biodiversity will continue to buckle under the weight of land- and sea-use change, overexploitation, climate change, pollution and invasive alien species. This will further damage human health, economies and societies – with particularly detrimental effects on indigenous peoples and local communities” said Inger Andersen Executive Director, UNEP.

“We know what needs to be done, what works and how we can achieve good results. If we build on what has already been achieved, and place biodiversity at the heart of all our policies and decisions – including in COVID-19 recovery packages – we can ensure a better future for our societies and the planet” she added.

By partially met, GBO5 refers to targets where at least one distinct element has been met. For example, the elements of Target 11 regarding the proportions of lands and seas protected was met, but the elements related to the quality of protected areas were not. Similarly, for Target 19, biodiversity knowledge has improved but it has not been widely shared or applied. For Target 20, official development assistance doubled but resources did not increase from all sources.

The national reports to the CBD offer evidence that the types of transitions needed moving forward are beginning; that virtually all countries are taking steps to protect biodiversity.

GBO5 cites several exemplary national actions and programmes, in the absence of which conditions would certainly be worse (extinctions would be higher for example).

In addition, for example, deforestation rates continue to fall, eradication of invasive alien species from islands is increasing, awareness of biodiversity appears to be increasing.

“The actions that have been taken need to be significantly scaled up, move from being project driven and become more systemic and broadened,” says Ms. Mrema. “Also, the gaps in national ambition and action need to be filled. The information in part III of GBO-5 is about doing this and provides examples of the types of actions that needed going forward.”

The report calls for a shift away from “business as usual” across a range of human activities. It outlines eight transitions that recognize the value of biodiversity, the need to restore the ecosystems on which all human activity depends, and the urgency of reducing the negative impacts of such activity:

  • The land and forests transition: conserving intact ecosystems, restoring ecosystems, combatting and reversing degradation, and employing landscape level spatial planning to avoid, reduce and mitigate land-use change
  • The sustainable agriculture transition: redesigning agricultural systems through agroecological and other innovative approaches to enhance productivity while minimizing negative impacts on biodiversity
  • The sustainable food systems transition: enabling sustainable and healthy diets with a greater emphasis on a diversity of foods, mostly plant-based, and more moderate consumption of meat and fish, as well as dramatic cuts in the waste involved in food supply and consumption
  • The sustainable fisheries and oceans transition: protecting and restoring marine and coastal ecosystems, rebuilding fisheries and managing aquaculture and other uses of the oceans to ensure sustainability, and to enhance food security and livelihoods
  • The cities and infrastructure transition: deploying “green infrastructure” and making space for nature within built landscapes to improve the health and quality of life for citizens and to reduce the environmental footprint of cities and infrastructure
  • The sustainable freshwater transition: an integrated approach guaranteeing the water flows required by nature and people, improving water quality, protecting critical habitats, controlling invasive species and safeguarding connectivity to allow the recovery of freshwater systems from mountains to coasts
  • The sustainable climate action transition: employing nature-based solutions, alongside a rapid phase-out of fossil fuel use, to reduce the scale and impacts of climate change, while providing positive benefits for biodiversity and other sustainable development goals
  • The biodiversity-inclusive One Health transition: managing ecosystems, including agricultural and urban ecosystems, as well as the use of wildlife, through an integrated approach, to promote healthy ecosystems and healthy people.
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GHG emissions from pyrolysis are nine times higher than in mechanical recycling

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New study published today by Zero Waste Europe (ZWE) finds that greenhouse gas emissions from pyrolysis of plastic packaging are nine times higher than that of mechanical recycling. The “Climate impact of pyrolysis of waste plastic packaging in comparison with reuse and mechanical recycling” study is based on the estimated future recycling content targets in plastic packaging.

BACKGROUND: In the context of the revision of the Packaging and Packaging Waste Directive (PPWD), the European Commission (EC) assigned the independent consultancy Eunomia to consider the possible introduction of recycled content targets for plastic packaging by 2030. Based on the estimated future recycling content targets in plastic packaging, Eunomia determined to recycle quantities that must come as outputs from chemical recycling or mechanical recycling. Chemical recycling, in this case, means thermo-chemical (i.e. pyrolysis) recycling.

With this study, commissioned by ZWE and Rethink Plastic alliance to Öko-Institut, we calculated the impact of Eunomia’s proposed scenario regarding greenhouse gas (GHG) emissions and carbon loss. The study compares seven scenarios to meet the projected recycled content target by 2030, and puts them into perspective with the Paris Agreement commitments to limit global warming to 1.5 degrees Celsius. 

The study found that: 

  • Pyrolysis GHG emissions are nine times higher than those in mechanical recycling – in all scenarios considered over 75% of greenhouse gas emissions are attributable to chemical recycling;
  • Over half of the carbon content of plastic is lost in the pyrolysis process and has to be replaced by new plastic;
  • Mechanical recycling must be prioritised over pyrolysis wherever possible –  shifting 30% of the production attributed to chemical recycling by Eunomia to mechanical recycling would reduce GHG emissions by 31%;
  • Combining shit to more mechanical recycling together with a reduction of 20% of packaging would result in a 45% reduction of GHG emissions compared to the “chemical recycling scenario”.
  • Combining mechanical and chemical recycling to transform plastic waste into recyclate avoids the GHG emissions associated with the use of primary plastic.


ZWE’s Chemical Recycling and Plastic-to-Fuel Policy Officer, Lauriane Veillard says: “The revision of the PPWD should serve as a lever to make the packaging sector more circular and be in line with European climate commitments to limit Global Warming to 1.5 Degrees Celsius. There are other ways than pyrolysis for contact-sensitive materials. The climate impact of the managing pathways should be considered when setting targets. The revision is the opportunity to rethink the overall volume and the use we make of plastic packaging.“

With this in mind, ZWE urges the European Commission (EC) to consider the reports’ findings in the upcoming revision of the PPWD and to:

  • Introduce legal safeguards to prioritise mechanical recycling over pyrolysis;
  • Consider the climate impact of different recycling technologies when settings targets for recycled content;
  • Incentivise measures such as design for recycling and innovations along the plastic packaging value chain to facilitate mechanical recycling.

Lauriane Veillard adds: “If we are serious about achieving net-zero emission economy, mechanical recycling must be preferred over pyrolysis. However, this cannot be achieved unless legal safeguards as part of the P&PWD revision are introduced to prioritise mechanical processes for recycling packaging waste complemented with ambitious prevention and reuse targets”. 

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UN spotlights transformational potential of family farming for world food supply

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María Fernanda Masís and her family are the owners of the hot sauces brand Xoloitzcuintle, named after their farm. Photo: UNEP

A Global Forum highlighting the UN’s Decade of Family Farming (UNDFF) got underway on Monday, aimed at identifying priority policies to boost support for family farmers and agricultural development worldwide.

The UNDFF runs through the end of 2028, and the Forum is being convened by the UN Food and Agriculture Organization (FAO) and the International Fund for Agricultural Development (IFAD).

FAO Director-General QU Dongyu, pointed out in his video address to the Global Forum’s opening that the world is moving backwards in its efforts to eliminate hunger and malnutrition.

Growing hunger

He said the number of people facing hunger increased in 2021, and it risks rising further especially among the most vulnerable, of which almost 80 percent live in rural areas and are small-scale, family farmers.

Family farmers around the world are also subject to the new challenges to food systems everywhere, created by the climate crisis, as well as conflict. The war in Ukraine has added further pressure, to already fragile agrifood systems, UN agencies said.

Mr. QU said the forum provides a way, firstly, to discuss “the unique role of family farmers in transforming our agrifood systems; two, take stock of achievements and challenges in the implementation of the UN Decade; and three, strengthen collaboration to ensure global food security, enhance livelihoods and achieve the Sustainable Development Goals”.

80 percent

Family farmers need to be at the centre of efforts to transform agrifood systems if we are to make real progress towards ending hunger,” Mr. Qu said.

He added that “family farming is the main form of agriculture in both developed and developing countries and is responsible for producing 80 percent of the world’s food,” in terms of value.

Family struggle

He noted that often, these family farmers struggle to feed their own families.

Since its launch three years ago, the UN Decade of Family Farming has been promoting integrated policies and investments to support family farmers, and FAO has been assisting national implementation of international tools and guidelines to strengthen family farming, Mr. Qu told the virtual forum.

He also noted that FAO hosts the Family Farming Knowledge Platform to facilitate the exchange of experience, innovation and specialised knowledge.

In addition, the FAO Strategic Framework 2022-31 includes a priority area of work aimed at better supporting small-scale food producers and delivering concrete results.

Push for the future

The main objectives of the Global Forum are to provide a general overview of policy trends and the relevance of family farming to the global push towards reaching the Sustainable Development Goals; highlight the main outcomes of the first three years of implementation; and re-orient the UNDFF agenda through the practical lessons learned so far.

Participants include representatives from national governments, governmental agencies, UN agencies, family farmers and their organizations, civil society organizations, as well as NGOs; the private sector, the media and academia.

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Microalgae promise abundant healthy food and feed in any environment

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By Sofia Strodt

Feeding a growing world population that will reach 9.8 billion by 2050, according to United Nations forecasts, and the need to conserve natural resources for generations to come may seem conflicting at first.

But a solution, while not yet in sight, is certainly not out of reach. European scientists recently have developed an appetite for microalgae, also called phytoplankton, a sub-group of algae consisting of unicellular photosynthetic microorganisms.

Most people are familiar with the largest form of algae, kelp or seaweed. It can grow up to three metres long and, in some forms, is a well-known delicacy. The related species microalgae, which can be found in both seawater and freshwater, have gained attention in research due to their extraordinary properties.

These microscopic organisms can be used for animal feed, particularly in aquaculture, and various foods including pasta, vegan sausages, energy bars, bakery products and vegetable creams. 

Most commercial microalgae cultivation centres on the production of dried biomass such as chlorella or spirulina powder as a food providing considerable health benefits. Some microalgae strains not only accumulate up to 65–70% of protein but also are sustainable sources of omega-3 fatty acids – a substance that is conventionally derived mainly from fish and fish oil.

Additional bioactive compounds, such as vitamins B12, K or D, mean microalgae contain significant health properties, potentially reducing the risk of cancer and cardiovascular illness.

Desert algae

‘Microalgae can be cultivated in many different locations, under very different conditions,’ said Massimo Castellari, who is involved in the Horizon-funded ProFuture project aimed at scaling up microalgae production. ‘We can grow it in Iceland and in a desert climate.’  

The technologies for the intensive cultivation of microalgae have been in development since the 1950s.

Today, microalgae are cultivated in open- or closed-system photobioreactors, which are vessels designed to control biomass production. The closed-system version, while more expensive to build, offers more control over experimental parameters and less risk of contamination. 

The substance is by no means just a trendy food supplement. For example, in Chad, a landlocked, low-income country, the consumption of spirulina harvested from Lake Chad has significantly improved people’s nutritional status because spirulina is an excellent source of proteins and micronutrients.

On top of its nutritional value, microalgae offer climate benefits by sequestering carbon dioxide as well as economic advantages by using farming areas more efficiently and – through the use of non-arable land – expanding the possibility of biomass production. 

With a total of less than 57 000 tonnes cultivated in 2019, according to the UN Food and Agriculture Organization (FAO), production of microalgae is still very much in its early stages. By comparison, primary-crop output was 9.4 billion tonnes in 2019. 

Food inflation

Russia’s continuing war in Ukraine has highlighted just how vulnerable global food supply can be. Halts to Ukrainian grain exports and increases in energy prices have helped push food inflation around the world to record highs, with developing countries being hit disproportionately hard. In May this year, costs for food had risen by 42% compared with 2014-2016, the UN reported.  

Last year, as many as 828 million people were affected by hunger – an increase of roughly 46 million compared with 2020 and a surge of 150 million since the outbreak of the COVID-19 pandemic.

The FAO projects that some 670 million people will still face hunger by the end of the decade.   

While the benefits of cultivating organic microalgae for food and feed are substantial, market growth will require overcoming obstacles including a lack of automated production in the industry, according to Castellari, who works at the Institute of Agrifood Research and Technology in Barcelona, Spain.

‘The automatisation is still not completely implemented,’ he said. ‘There are small producers in Europe – many steps still involve manual labour. So they are still working on optimising the process.’ 

Processed biomass

The challenges go well beyond cultivation. With microalgae, biomass has to be processed, cleaned and dried before a usable powder can be obtained. The next step is to scale up production to drive down costs. 

In addition, there are regulatory challenges. Only a few species of microalgae are currently authorised in the European Union.

‘In Europe it’s still in a preliminary stage of development,’ said Castellari. ‘There are thousands of species of microalgae, but for food consumption or feed there are only seven species authorised.’ 

To gain knowledge about the possibilities to use other species, Castellari and his team are also investigating these other kinds of microalgae.

Due to these challenges, the portfolio of products containing microalgae remains limited today. But, if these hurdles can be overcome, the overall prospects for the microalgae industry are promising. Besides being a source of food and feed, the plant can be used for biofuels, cosmetics, fertiliser and health supplements.

Astaxanthin, a blood-red pigment extracted from algae, already has notable uses. A powerful antioxidant, astaxanthin can be found in seafood and is commonly used to colour shrimp. It is also sold in the form of pills as a food supplement.

Astaxanthin is thought to have potentially a positive impact on brain function, athletic performance and ageing skin, among other things.

Matteo Ballottari, associate professor of biotechnology at the University of Verona in Italy, helped start the European Research Council’s Horizon-funded project AstaOmega simultaneously to produce astaxanthin and omega-3 fatty acids in microalgae for aquaculture and human nutrition. 

Quality and quantity 

Most omega-3 supplements are derived from fish oils. This, however, raises sustainability concerns such as damage to marine ecosystems as a result of overfishing.  

‘There is more demand for eating high-quality foods, along with an awareness for incorporating omega-3 rich ingredients in our diets,’ Ballottari said. Responding to this trend while feeding a growing world population is ‘a big challenge,’ he said.

Meanwhile, on the astaxanthin front, the AstaOmega researchers have made progress. They have been able to obtain a new strain that can produce astaxanthin on its own, without needing to be “stressed”. This means the researchers don’t have to change production parameters such as light intensity, temperature or nitrates concentration. Also, extracting the substance has become easier, resulting in lower costs.  

Scientists agree that microalgae have the potential to change the ways in which we eat for the better.  

‘Microalgae can help us to increase the protein production within Europe to reduce our dependence on other countries,’ said Castellari of the ProFuture project.  

Research in this article was funded by the EU and it was originally published in Horizon, the EU Research and Innovation Magazine. 

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