Societies reiterate their stance on climate change

In a consensus letter to U.S. policymakers, a partnership of 31 leading nonpartisan scientific societies, including the ASA, CSSA and SSSA, reaffirmed the reality of human-caused climate change, noting that greenhouse gas emissions "must be substantially reduced" to minimize negative impacts on the global economy, natural resources, and human health. Climate-change impacts in the United States have already included increased threats of extreme weather events, sea-level rise, water scarcity, heat waves, wildfires, and disturbances to ecosystems and animals, the intersociety group reported. "The severity of climate change impacts is increasing and is expected to increase substantially in the coming decades," the letter added. It cited the scientific consensus of the vast majority of individual climate scientists and virtually every leading scientific organization in the world. Read the letter here.