Our planet is getting hotter and drier. Drinking water is in short supply, but there are two largely untapped sources: the ocean and sewage. To get a taste of what might be in store for our faucets and understand the pros and cons, journalist Amanda Little goes to California.
Using glacier water and pipes (with a big boost from gravity), Indian engineer Sonam Wangchuk has devised a way to store water in the dry high desert.
How can you protect crops against global warming? One answer: find the secrets of plants that already thrive in the most punishing climates, says microbiologist Rusty Rodriguez.
How the artist Mundano uses his work to call attention to the urgency of vanishing water supplies in California.