A surprising 20-year-long data record from NASA has come out just in time for Earth Day, showing that the world has gotten greener within the past two decades. The greening is thanks to China and India’s efforts in forest conservation and expansion.

In January, when I interviewed Jimmy Carter, the former president told me that one way forward for the U.S. and China was to create a group of wise men and women who can guide the future relationship. Carter said he will send that suggestion to President Donald Trump - who has just confirmed that the two men have spoken. Also, Professor Wang Jisi of Peking University reacts to a New York Times report of limited visas for Chinese academics.

Bill Gates says she's changing the game. So does Al Gore. Tech teen Emma Yang, who grew up in Hong Kong and now lives in New York, loves her grandmother so much, she's created an app that uses facial-recognition technology to ensure that her family - and potentially millions more - can communicate meaningfully with people with Alzheimer's. James Chau met Emma in New York, where she gave him a preview of her Timeless app and discussed how humanizing technology can help create a better world.