At the foot of a giant sequoia in California’s Sierra Nevada, two arborists stepped into harnesses then inched up ropes more than 20 stories into the dizzying canopy of a tree that survived thousands of years, enduring drought, wildfire and disease.
The United Nations has issued a plea for nations to fast-track ratification of the Paris Climate Agreement as some countries are backtracking on support for the deal’s sweeping restrictions on greenhouse gas emissions.
New York state and Massachusetts are suing Volkswagen and its affiliates Audi and Porsche over diesel emissions cheating, alleging that the German automakers defrauded customers by selling diesel vehicles equipped with software allowing them to cheat emissions testing.
The U.S. government has issued a report on fuel economy and greenhouse gas standards for U.S. cars and trucks that were first established in 2012. The report Monday kicked off a two-year review process leading to a government decision on whether to leave the standards in place through 2025 or change them.
California authorities have made their first arrest linked to a drone operator who allegedly interfered with firefighters’ efforts to battle wildfires.