Is China exporting its authoritarian model to other countries? Is the “fast fashion” industry accelerating climate change? In season two, Why It Matters explores a new series of issues that are flyin…

As climate change accelerates, some scientists are researching ways to alter our climate to slow down warming. But the method, called solar geoengineering, comes with some serious risks. 

A U.S. president can launch a first-strike nuclear attack at any time and, according to the law, does not need to seek advice first. Some experts think that’s too much power to put in one person’s ha…