Swedish teen activist Greta Thunberg is taking a year off school to pursue her campaign to curb global warming in the Americas, which she will reach by sailboat on a transatlantic voyage. She will travel from Britain to the United States on a racing boat fitted with solar panels and underwater turbines that produce electricity onboard, making the journey zero-carbon.

In September 2017, San Francisco experienced its hottest day on record, with temperatures reaching a searing 106 degrees. Weeks later, the city joined Oakland to announce it would sue five major fossil fuel firms — BP, Shell, ExxonMobil, Chevron, and ConocoPhillips — for the costs of building sea walls and other infrastructure to protect residents from global warming.