Government statistics say a full 60% of the US population weighs more than it should. The problem is particularly troubling among children. And experts warn our healthcare system won't be able to carry all that extra poundage. From the Sustainability Desk, Sarah Gardner reports.

You might not have given it much thought, but that greenspace in your town costs money. The burden has usually fallen on taxpayers. Now, a growing number of parks are sprouting corporate logos. Bob Moon reports.

Some California lawmakers introduced a bill today to limit greenhouse gases. They want to cut pollution that contributes to global warming 25% by 2020. But business groups say the legislators are barking up the wrong tree. John Dimsdale reports.