Science is never 100% settled, it deals with hypotheses and assumptions. However, some try to argue that global warming isn't real just because there is no way to "prove" that it is.
Geo-engineering options to block the sun?, Climate change polls shows that less than half of Americans say they are "somewhat" or "very worried" about global warming and finally The UN Department hosts a green fashion show.
Join a cast of celebrities, scientists and experts who explore the dangerous state of the Earth's environment and how we can fix the damage that's already done.
Eve Mosher is taking her message to the streets. She's chalking a line across New York City that shows where flooding could reach if a really big storm hits.
Carbon dioxide is being stocked in underground reservoirs in the Algerian desert as part of a new way to stop the greenhouse gas from contributing to global warming. But will it work?
If climate change is evident anywhere in the United States, it's in Alaska. Kasey-Dee Gardner spent a week in the arctic state to see for herself what's happening.