On a cold day in November, hundreds of people flocked to an arena in Coventry, which has previously hosted gigs by Oasis, Rihanna, and Harry Styles, for an event of a very different kind.

A welder this month at the Deep Sky carbon capture facility under construction in Innisfail, Alberta.Credit...Amber Bracken for The New York Times Supported by By David Gelles and Christopher ...

Could that include getting countries to cool the planet? Canada and the U.S. are among those discussing carbon tariffs or carbon border adjustments as a way to protect local industry and ...