Major cracks have appeared in recent months in Petermann Glacier in Greenland and the Larsen C Ice Shelf in Antarctica. These cracks are advancing and will soon release enormous icebergs into the ocean, one the size of the state of Delaware. They will allow ice from the interior of Greenland and Antarctica to flow into the ocean, contributing to sea level rise. Coastal areas in the U.S. will experience increased flooding, disrupting ports and airports, and interfering with the American economy that Trump claims to support, as well as causing harm to societies and ecosystems around the world.
And today a major crack appeared in the Paris Agreement, with Trump’s announcement of his intention to pull the U.S. out of it. This crack threatens to release, not icebergs, but distrust and despair, and disrupt the mechanisms that had begun to slow down global greenhouse gas emissions. This crack— in policy agreements rather than in masses of ice— can be sealed, by efforts of other countries, and of states and cities in the United States and by actions of the corporations and organizations that sought to keep the U.S. in the agreement.
The laws of physics indicate that ice will continue to flow from Greenland and Antarctica, at least as long as global warming is not abated. But the processes within global society are not as inevitable. With concerted action, the Paris Agreement can still be a vital force to preserve our planet from one of the greatest threats it has ever faced.