Why should the US government try to help the manufacturing? Although factory work used to offer a pay premium, this has disappeared in recent years: Manufacturing workers also tend to work long, grueling hours. But because of automation and global supply chains, mass manufacturing employment isn’t poised for a comeback in the US; either things will be made by low-wage ...

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, ...