Texas Gov. Rick Perry previously supported the extension of federal incentives for wind power before signaling last week that he would let them expire if elected president. The production tax credit is widely seen as a key driver of the Texas wind boom. It lowers the cost of producing wind power by 2.2 cents per kilowatt-hour, providing a financial edge that has helped developers compete with low-priced electricity derived from coal and natural gas. Go to story #1

NEW YORK -- What would the world look like with 7 billion human beings in the mix, vying for resources? Pretty much what it looks like now. That's because the planet is about to pass the 7 billion mark any day now. Or maybe it already has, according to academics at Columbia University. Go to story #2