REASON #1: Consider the category 4 and 5 hurricanes that have developed in one season -- the intensity attributed to climate change. The latest, hurricane Maria devastated Dominica lost some of its force but still hit Puerto Rico as a category four -- the worst in living memory. About two weeks earlier, hurricane Irma flattened St. Maarten with 225 mph winds. Including Matthew last October, there have been three of category 5 strength within the period of a year.
The Earth is experiencing the warmest surface temperatures since modern climate measurements were implemented in 1880. This extreme global warming is the result of excessive concentrations of greenhouse gases in the atmosphere. Moreover, overwhelming scientific evidence has concluded that climate change has been caused by anthropogenic greenhouse gas emissions, and if these are not substantially reduced, the devastating effects that it will have for future centuries will be irreversible.