David Greene talks to Gov. Jerry Brown about the program which sets limits on greenhouse gas emissions while issuing permits for emission of pollutants which companies can sell.
Even though President Trump promised to pull the U.S. from the Paris climate accord, Al Gore still sees an "excellent chance" of meeting the accord's commitments to reduce global warming.
Seeds on Ice author Cary Fowler describes the underground tunnel near the North Pole, which stores and protects a collection of 933,000 samples of different, unique crop varieties.
Nomadic herders in Kenya's northwest are having to move farther afield as sustained drought fundamentally changes the landscape. The result: no grasses for their herds.
The search for Malaysia Airlines Flight 370 did not turn up a plane, but it did uncover a detailed view of the ocean floor — volcanoes, shipwrecks, and mountains to rival Mount Everest.
Fires are burning in British Columbia. Scott Simon talks to Alan Goodwin of the Australasian Fire and Emergency Service Authorities Council, a program that shares firefighters with other countries.
Scientists plan to release millions of sterile, male bacteria-infected mosquitoes in California, to breed with wild females. They're hoping for a "steep decline" in the species that carries Zika.
The world is running out of sand. So much so that some countries have banned exports of sand, and there is a thriving black market for it. David Greene talks to freelance journalist Vince Beiser.