After just a few days, billions of dollars have been committed to clean energy.
Some of the event’s sponsors might be part of the problem, not the solution.
As major UN talks kick off in Paris, the president acknowledged America’s role in causing global warming.
Diplomats and scientists are descending on the French capital Monday. They’ll try to save the world.
Watch: Obama’s Top Environmental Official on the Paris Attacks and Why Climate Change Threatens National Security
Two weeks before the Paris climate talks, EPA Administrator Gina McCarthy says the US is serious about taking action.