This video/slideshow provides an explanation that explains how greenhouse gases that cause further warming. [2:14]

This video segment adapted from NOVA/FRONTLINE examines the greenhouse effect, its role in keeping Earth habitable, and the industrial changes that have led to an increase in the planet's average temperature. Includes background reading...

We'll talk about the climate talks in Copenhagen, the EPA decision to regulate greenhouse gases as pollutants, and more.

How big a role does concrete manufacture play in greenhouse gas emissions? New research says it may be less than previously thought.

How large is your 'carbon footprint' -- the amount you contribute to greenhouse gas emissions? We'll talk to a researcher looking at energy usage around the country, from homeless people to the rich and famous.

When it comes to greenhouse gas emissions, what you eat may be more important than where that food comes from, a new study finds. [12 mins. 8]

A consortium of Northeast states has completed the first US cap-and-trade greenhouse gas auction. We'll find out how it went. [8 mins. 36]

Video explains the importance of the Ozone layer. [4:24]

Continuing with Environmental Science, we'll be taking a look at some of the non-renewable energy sources and their benefits and drawbacks.