Green

There is some political willingness, but because China is highly decentralized politically the Communist Party has only limited influence over provincial governments and how they regulate their dirty factories. The powerful state-owned oil companies have also resisted pressure to produce cleaner-burning fuel.

The revival is partly based on the humble sour fruit's growing reputation as a superfood. And in Michigan, a scientist is on a quest to introduce a whole new world of hardier, tastier tart cherries by breeding American trees with ancestral varieties from Eastern Europe.

At nearly seven miles below the water's surface, the Mariana Trench is the deepest spot in Earth's oceans. And the site north of Guam is where director and explorer James Cameron fulfilled a longtime goal of reaching the bottom in a manned craft.