Last year, I wasn’t sure that Twitter Inc.’s recovery was real. Now, it looks as if it is. Twitter is not out of the woods, but it’s clear the company has stabilised financially after a long stretch of wobbles. Advertising sales rose 18 percent in the first quarter, the company reported. That was the fifth consecutive period of healthy gains. ...

Limiting climate change means curbing greenhouse-gas emissions, it’s well known. But controlling emissions won’t be enough by itself to stop global temperatures from warming uncomfortably beyond 1.5 degrees Celsius. Carbon dioxide already in the air needs to be cleared away too. By the end of this century, up to a trillion tons of carbon dioxide will have to be removed, ...

Emmanuel Macron is trying to be something new in French politics — a president who responds to public concerns without dropping his reforms at the first sign of trouble. Instead he has tried to air public grievances and react without caving into protesters’ demands. For this he deserves credit. To pull France out of the economic troubles that have created ...