Corporate investment in artificial-intelligence infrastructure reaches $1.4trn by some estimates. We ask what might threaten the expected windfalls that justify the spending. A Japanese mine’s bid to be listed by UNESCO was made harder because it ignores South Korean wartime forced labour (10:49). And why a nicotine pouch has so many fans on America’s right (18:03).Get a world of insights by subscribing to Economist Podcasts+. For more information about how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account.