methane

Among the three of us, we have 15 decades of high-level experience in climate science, policies, and actions, and we have never been more alarmed than we are at this moment. The United Nations has just officially declared that the world has failed in limiting global warming to a safe level. During the last decade, heat-trapping pollutants nearly doubled the rate that heat is being added to the planet—a rate that will push temperatures across the 1.5°C threshold in five years or less and breach the first barrier of the Paris Agreement. This will further destabilize natural climate systems and amplify weather extremes, which are already costing the world economy more than $ 2 trillion annually. At the current rate of warming, the global temperature is likely to cross 2°C in about 15 years, the outer limit of the Paris Agreement, taking us into a climate not witnessed by homo sapiens, ever.

High altitudes in the Tibetan-Himalayan region and the Alps are already warming at two to three times the global average (which may be implicated in the recent Nepal-Tibet floods that left 1,400 confirmed dead and 5,000 missing). Other disastrous impacts of reaching 2°C include the transition of the Amazon from a forest into a savanna. The health impacts could be the worst of all. At 2°C, heat deaths in 2050 could reach a staggering 2 billion in a worst-case analysis by actuarial experts at Exeter University.