Every week, our lead climate reporter brings you the big ideas, expert analysis, and vital guidance that will help you flourish on a changing planet. Sign up to get The Weekly Planet, our guide to living through climate change, in your inbox.One of the core ideas of this newsletter is that you can’t fight climate change without altering the stuff of the world.

Across the United States, cases have started rising again. In a few cities, even hospitalizations are ticking up. The twists and turns of a pandemic can be hard to predict, but this most recent increase was almost inevitable: A more transmissible and more deadly variant called B.1.1.7 has established itself at the precise moment when many regions are opening up rapidly by lifting mask mandates, indoor-gathering restrictions, and occupancy limits on gyms and restaurants.

As of today, more than 565 million COVID-19 vaccine doses have been administered around the world, at a rate of about 14 million doses a day. Shots are being given at mass-vaccination sites, hospitals, small clinics, and in people’s homes, as governments and organizations work to reach everyone currently eligible. The work has only just begun, though; despite encouraging early numbers, only 4 percent of the global population has received at least one dose so far.

The childhood memories we retain most searingly tend to involve shame. When I was 6, after being chided twice for talking too loudly during lunch, I was made to stand in the cafeteria by myself until the other kids finished their food. I can’t even type that sentence without flushing at how conspicuously bad I felt, and how alone.