U.S. President Barack Obama delivered an optimistic speech Tuesday at the Paris climate talks before leaving France.

China, which has pledged to set an example for other countries trying to combat climate change, will launch two satellites to monitor its greenhouse gas emissions in 2016.

Making polluters pay would help steer companies and investors away from high-carbon energy sources, advocates say, but the plan faces opposition at a U.N. summit.

France and Germany are not known for sunny skies, but are nevertheless using government initiatives to spur a shift toward renewable solar energy.

With world leaders in Paris talking about climate change, a look at whether or not the discussion may meet environmentalists expectation and how investors may profit.

The technology leader announced an initiative by more than 25 private investors to support cutting-edge, zero-carbon energy breakthroughs.

The Eiffel Tower lights up with messages of hope during the international climate conference hosted by France.

World leaders are meeting in France this week to address global climate issues. Click here for the latest developments.

The leaders of China and the U.S. emphasized that climate change will only be solved if developed and developing nations can find ways to work in partnership.

China has pledged to seek a binding agreement in Paris, but says developed nations must provide financial support to developing countries.