Dozens of billion-dollar companies. Thousands of high-paying IT and manufacturing jobs. Luxury apartments towering over the Bay of Bengal. The southern Indian city of Chennai has one of the world's fastest-growing economies, but it's out of water, threatening to put a brake on all that growth. Here's a look at the city.

"We urgently need action on climate change, but even if we get it, there are larger issues. It’s not just climate. Humanity is overwhelming the planet, its resources and its life-supporting capacity. We are not in any danger of extinction, not yet anyway. But the human juggernaut — and the needs and aspirations that propel it — is headed for a day of reckoning," says columnist Robert Walker.

Gaming is going green — and some of the biggest game companies hope players will, too. The companies behind PlayStation, Xbox, Angry Birds, Minecraft, Twitch and other video games and platforms pledged Monday at the U.N. to level up efforts to fight climate change and get their throngs of users involved.

When Alfred Brownell arrived in a remote Liberian village, the surrounding tropical rainforest had been leveled by bulldozers. Burial grounds were uprooted, religious shrines were desecrated and a stream people depended upon for water was polluted. Brownell blamed the devastation on a palm oil company that had been given a green light in 2010 by the government to expand in the country and was poised to turn more than 800 square miles of lush forest into palm oil plantations. Brownell on Monday was awarded the Goldman Environmental Prize for exposing alleged abuse by the company and helping to prevent it from converting about 20 square miles of forest that is home to elephants, pygmy hippopotamuses and chimpanzees.

Scientists are seeing surprising melting in Earth's polar regions at times they don't expect, like winter, and in places they don't expect, like Antarctica. "It's a new Arctic. We've gone from white to blue," said a former NASA scientist, adding that he normally wouldn't use the word "scary" but it applies.

A third of Guam's coral reefs have died because of rising ocean temperatures, researchers said. University of Guam researchers said increased temperatures killed 34% of Guam's coral reefs between 2013 and 2017. About 60% of the reefs along Guam's eastern coast are gone, scientists said.

Greta Thunberg's two-week voyage to the United States will be no pleasure cruise. The 16-year-old climate change activist who has inspired student protests around the world will leave Plymouth, England, bound for New York in a high-tech but decidedly low-comfort sailboat.

Last month was the hottest January since scientists began keeping temperature records in 1880, U.S. government forecasters said Thursday.

The temperature in northern Antarctica hit nearly 65 degrees (18.3 degrees Celsius), a likely heat record on the continent best known for snow, ice and penguins. The reading was taken Thursday at an Argentine research base and still needs to be verified by the World Meteorological Organization.

Children are growing up in a warmer world that will hit them with more and different health problems than their parents experienced, an international report by doctors said. With increasing diarrhea diseases, more dangerous heat waves, air pollution and increases in mosquito-borne diseases such as dengue fever and malaria, man-made global warming is already harming public health around the world, the annual climate change and health report from the medical journal The Lancet said Wednesday.