I believe that climate change represents one of the greatest threats to our national security and our planet.
The U.S. news media have a critical role to play in educating the public about climate change.
The shift to a cleaner energy economy wont happen overnight, and it will require tough choices along the way. But the debate is settled. Climate change is a fact.
The European nations take climate change very seriously.
Doing all we can to combat climate change comes with numerous benefits, from reducing pollution and associated health care costs to strengthening and diversifying the economy by shifting to renewable energy, among other measures.
I have never met a geologist or leading scientist who believes adding more carbon dioxide to the atmosphere will have any significant effect on climate change.
Developed countries should support developing countries in tackling climate change. This not only is their responsibility, but also serves their long-term interests.
Among all the tests President Obama faced in his first term, his biggest failure was climate change.
Given that, and assuming that we begin to adjust to issues like climate change and the greenhouse effect, Denver's location in the center of the country becomes a tremendous advantage.
Europe is dying. That is one of the unsayable truths of our time. We are undergoing the moral equivalent of climate change and no one is talking about it.
One thing we do know about the threat of climate change is that the cost of adjustment only grows the longer it's left unaddressed.
It's absolutely not acceptable for people to argue that, if we are going to do anything about climate change at all, well, the responsibility lies solely with the individual.
Once you start to look into the guts of climate change you find that just about every scientific institution in the world is conducting research on the issue.
What I worry about is climate change, because that would have untold effects that we can't even measure yet.
Instead of sitting on the sidelines, President Obama has made it clear that the US is ready to lead a global effort to combat climate change.
There are great challenges before you, from the overwhelming nature of climate change to the unfairness of an economy that excludes so many from our collective wealth, and the changes necessary to build a more inclusive and generous Canada. I believe...
An element of wisdom is knowing that life experiences are blood brothers with climate change, whether you have the resources to detect weather changes, it can still surprise you anytime.
The world can't have a global solution to climate change with U.S. action alone; and the world can't have a global solution without U.S. action.
Denial of climate change and degradation of environment for the purpose of economic prosperity is humiliation and slavery of the nature.
Those who deny human-caused climate change offer no compelling evidence to better explain the undeniable rise in atmospheric concentrations of greenhouse gases and global temperature.
People are going to buy cheap fertilizer so they can grow enough crops to feed themselves, which will be increasingly difficult with climate change.
