Bioscience Talks

In a year marked by unprecedented flooding, deadly avalanches, and scorching heat waves and wildfires, the climate emergency's enormous cost—whether measured in lost resources or human lives—is all too apparent. Writing in BioScience, a group led by William J. Ripple and Christopher Wolf, both with Oregon State University, update their striking 2019 "World Scientists’ Warning of a Climate Emergency" with new data on the climate's health. The news is not good.            Although fossil fuel use dipped slightly in 2020, a widely predicted result of the COVID-19 pandemic, the authors report that carbon dioxide, methane, and nitrous oxide "have all set new year-to-date records for atmospheric concentrations in both 2020 and 2021." Furthermore, 16 out of 31 tracked planetary vital signs, reflecting metrics such as greenhouse gas concentrations, ocean heat content, and ice mass, have also set disquieting records. However, there were a few bright spots, including fossil fuel subsidies reaching a record low and foss