21st century Quote by David Titley

I think the climate has been changing for billions of years.

— Buzz Aldrin

Climate change is the greatest threat to our common future. We have a very short period of time to tackle the problem before it…

— Chris Huhne

Climate has been changing for billions of years.

— Buzz Aldrin

Climate change is a matter of great peril but also one of great promise. We can pioneer the industries of the future, create millions…

— Jay Inslee

Global climate change is one of the greatest challenges facing humanity in the twenty-first century.

— Angela Merkel

Climate change poses a direct threat to the infrastructure of America that we need to stay competitive in this 21st-century economy.

— Barack Obama

We really are already seeing the impacts of climate change, of temperatures rising all around the world.

— Declan McKenna

If we invest in researching and developing energy technology, we'll do some real good in the long run, rather than just making ourselves feel…

— Bjorn Lomborg

We, the older generations, simply cannot leave a world for you, the younger generations, in which climate change impacts become ever more threatening to…

— Christiana Figueres

Climate change is real. In order to alter this reality, we need all hands on deck.

— Gisele Bundchen

I believe that climate change is the great global crisis that we face, environmental crisis. I believe that if you're serious about climate change,…

— Bernie Sanders

The world is at a big risk from climate change. We have to come up with solutions, to bring in a sustainable economy.

— Tulsi Tanti