When it comes to climate change and other environment challenges, Mitt Romney can plead ignorance, even if it's feigned. But what about President Obama?

Victory has been declared in a decade-long campaign to globally phase out lead from gasoline. More than 185 countries worldwide have stopped adding...

Now with parts of Haiti in ruin and perhaps 200,000 people dead, the tree-planting and the soil sampling have halted. But the catastrophe makes it more critical than ever that Haiti be re-greened.

I begun to be involved with growing algae in raceways a third of a century ago, and from then until now, have observed that federal funding was spotty and mostly non-existent.

Hundreds of square miles of ocean, just North West of Hawaii, are covered thick with floating human garbage. The ocean doesn't clean itself.