Living on Earth's Ashley Ahearn heads out to the Montana range to take a look at how ranchers are using their land to absorb the greenhouse gas carbon dioxide, and make some money on the carbon offset market in the process.
Some say that limiting industry's greenhouse emissions isn't enough; individuals need to be put on a cap and trade plan, too. Guest: Richard Starkey, a researcher with the Tyndall Centre for Climate Change Research in the UK, about a number of personal CO2 trading schemes, and the challenges to putting limits on people's carbon emissions.
The monarch butterflies of central Mexico are beginning their annual northern migration but this year, there may be a decline in the number making the trip, as Anchor Marco Werman speaks with butterfly expert Lincoln Brower
The World's Jason Margolis reports on a group of people we haven't heard from in a while: global warming skeptics; they believe climate change isn't real and that governments shouldn't regulate greenhouse gases.
Anchor Lisa Mullins speaks to one who isn't skeptical at all about climate change; Lester Brown is president of the Earth Policy Institute and the author of "Plan B 3.0: Mobilizing to Save Civilization
The BBC's John Leyne spoke to Iranian citizens on the streets of Tehran to hear what they have to say about their country's nuclear stand-off with the West; Iran is once again under pressure from the United States over nuclear issues.