Century Quote by James Hansen

As best as can be determined, the world is now warmer than it has been at any point in the last two millennia, and,…

— Elizabeth Kolbert

Some 3 million years ago, when the earth was a little more than 3°C warmer than preindustrial levels (about 2.2°C warmer than today), Antarctica…

— Joseph J. Romm

“Fahrenheit warmer by the end of this century. This is catastrophic. It will mean more drought, more famine, more rising sea level, more floods,…

— Bernie Sanders

The last time Earth was 1°C warmer than today, sea levels were 20 feet higher.

— Joseph J. Romm

We thought we knew 20 years ago. That led to some alarmist books – mine included – because it looked clear-cut, but it hasn’t…

— James Lovelock

In recent years, our planet has been warming at an alarming rate and seen record-breaking temperatures. We are now witnessing the sixth mass extinction…

— Catherine Cortez-Masto

So far the earth has warmed about a degree Fahrenheit globally averaged. That doesn't seem like an enormous amount but it's unlike what we…

— Bill McKibben

The science is crystal clear: we humans are the primary cause of global warming, and we face a bleak future if we fail to…

— Joseph J. Romm

If it were only a few degrees, that would be serious, but we could adapt to it. But the danger is the warming process…

— Stephen Hawking

Global warming is already acting upon us with an accelerated feedback and compounded effect that may be irreversible! We do not have eons or…

— Michael Parenti

We're clearly not going to stop global warming at this point. We've already raised the temperature of the planet one degree. We've got another…

— Bill McKibben

The world has not warmed up very much since the millennium.

— James Lovelock