Federal scientists and lawyers, told to undo regulations that some have worked on for decades, have embedded data into technical documents that environmental lawyers are using to challenge the rollbacks.
Greenhouse gas emissions and declining ozone have similar effects on the Southern Hemisphere's atmosphere. The exact mechanisms are a little different, but climate change seems to encourage a poleward shift of the jet stream and an expansion of the tropics.
As the world's oceans have warmed by one degree Celsius since pre-industrial times, there has been a pervasive shift in abundance of marine life, from plankton and fish to mammals, seabirds and macroalgae.
A dramatic reduction in air pollution might seem like a silver lining in global efforts to combat the COVID-19 pandemic, but the world could see a "huge backlash" in emissions once the crisis comes to an end.