John Holdren Quotes

If you look at all the serious scientists in the world, there is no big disagreement on the basics of this... it would be absolute lunacy to act as if climate change is not occurring.

Climate change is also clearly a matter of huge interest and concern for the scientific community.

On climate change, we often don't fully appreciate that it is a problem. We think it is a problem waiting to happen.

Well, I think it's clear that the climate is changing. I think reasonable people can differ about how much and how rapidly. But I think it's clear that it's changing and it's clear that humans are a contributing factor.

Climate change is real. Climate change is being substantially increased by humans and the carbon we put into the atmosphere. And it appears to be speeding up. If science has made any mistakes, science has been underestimating it.

Most reputable scientists agree that climate change is real and that the effects are likely to be bad. But nobody can say for sure exactly what 'bad' means. The safest and most equitable way out of this horrific mess is simple: cut fossil-fuel emissions.

The U.S. has fallen well behind Europe in recognizing climate change and the implications of climate change.

Geological change usually takes thousands of years to happen but we are seeing the climate changing not just in our lifetimes but also year by year.

There is no question that climate change is happening; the only arguable point is what part humans are playing in it.

Look, if anybody still wants to dispute the science around climate change, have at it. You'll be pretty lonely, because you'll be debating our military, most of America's business leaders, the majority of the American people, almost the entire scientific community, and 200 nations around the world who agree it's a problem and intend to solve it.

We can look back through ice-core data and see over 800,000 years, relationships between carbon dioxide and the temperature of the world. So those people who deny the importance of climate change are just wasting their time. They're also being diversionary because if we don't act the risks are enormous.

We unfortunately already live on a planet where the climate has changed and will continue to change no matter what we do now. We're playing a game of making the problem less bad rather than preventing it.

As far as I'm aware, everybody in the shadow cabinet accepts that there's a compelling case on climate change and a strong scientific case.

Climate change is such a huge issue that it requires strong, concerted, consistent and enduring action by governments.

Climate change was a point of division between Obama and Republican rival Mitt Romney. The president declared climate change a global threat, acknowledged that the actions of humanity were deepening the crisis, and pledged to do something about it if elected.

If you are interested enough in the climate crisis to read this post, you probably know that 2 degrees Centigrade of warming (or 3.6 degrees Fahrenheit) is the widely acknowledged threshold for "dangerous" climate change.

I don't believe that there is anybody who denies climate change in the Democratic caucus. Everybody accepts that it is a real problem.

Climate change is here. We have to learn how to deal with it.

The climate change issue is real and we are seeing its effects right here in South Carolina.

The scientific consensus is that climate change is real, urgent, and caused by humans. This science should be both supported and understood by anyone who hopes to lead NASA, one of our nation's top science agencies.

The evidence for human-made climate change is overwhelming.

China and India will take the global leadership on climate change: they are suffering for it.

The problem with climate change is that it's quite complicated for the ordinary person to understand.

Climate change is real.

Global climate change has a profound impact on the survival and development of mankind. It is a major challenge facing all countries.