An environmental protester scaled the facade of Washington D.C.’s John A. Wilson District Building on Friday to commemorate Earth Day by unfurling a large banner calling for the end of fossil fuels.

Two climate scientists were kicked out of a major science conference in Chicago on Thursday. Peter Kalmus and Rose Abramoff went onstage to urge other researchers to take climate action.

As we mark Earth Day, we shouldn’t panic but instead celebrate the immense environmental progress we’ve made—and will make, as long as prosperity continues. Bjorn Lomborg is President of the ...