James Hansen Quotes

We are watching things happen with one degree changes in ocean temperature that we thought wouldn't happen until there were two or three degree changes in ocean temperature. These are facts.

The average global temperature has increased by about 0.8 degrees Celsius since 1880, with two-thirds of the warming occurring since 1975.

Experts say this global warming is serious, and they are predicting now that by the year 2050, we will be out of party ice.

If it were only a few degrees, that would be serious, but we could adapt to it. But the danger is the warming process might be unstable and run away. We could end up like Venus, covered in clouds and with the surface temperature of 400 degrees. It could be too late if we wait until the bad effects of warming become obvious. We need action now to reduce emission of carbon dioxide.

Climate change is having a dramatic effect on the ground.

Listen, global warming is a real problem, but it' s not the end of the world. A 30-centimetre sea level rise is just not going to bring the world to a standstill, just like it didn't over the last 150 years.

Imagine what our planet would look like with an increase in temperature of two degrees or four degrees, given that at 0.8 degrees we already have serious problems in the world.

Every day, the temperature of Sol's surface increases by five billionths of a degree, a change of no consequence for thousands of millennia to come. But a few hundred million years from now, barring a fix by our descendants, this relentless heating will substantially change Earth's biosphere in ways that might not be survivable for us.

On climate change, we are told that there will be a civilization-ending development in the form of massive sea level rise as soon as 2050. Anybody plan to be here in 2050? I think a few of us do, myself included.

Global warming is a real threat to our communities, to everybody, to everything.

The impacts of climate change are not going to get better; they are going to get worse.

Climate change is the greatest threat to humanity, perhaps ever. Global temperatures are rising at an unprecedented rate, causing drought and forest fires and impacting human health.

Climate change isn't something people get to choose to believe or not: it's happening.

I think global warming is a very real problem for our world. I've seen the changes that have taken place in the Antarctic, in the Himalayas, where the natural ice has sort of faded away, and there's no doubt in my mind that we're living in a strange world, a world which is not easy to understand or handle, But there's nothing you can do about, you just have to live your life as best you can.

We are still learning how exactly the Earth reacts to increased CO2 and other greenhouse gases. We know it leads to warming seas which are melting the North and the South Poles, rising and starting to swallow entire coastal areas in the US and elsewhere, as the New York Times article documents.

For me the most important issue is climate change because it in some ways trumps every other issue. Everything else we care about falls by the wayside if the Greenland ice shelf falls into the sea. And if suddenly sea levels rise 21 feet, everything we hold near and dear ceases to exist.

We are upsetting the atmosphere upon which all life depends. In the late 80s when I began to take climate change seriously, we referred to global warming as a "slowmotion catastrophe" one we expected to kick in perhaps generations later. Instead, the signs of change have accelerated alarmingly.

The facts are there that we have created, man has, a self-inflicted wound that man has created through global warming.

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 would have expected twenty years ago.

We need the science to continue. The heat, the storms, the sea level rise, the Arctic melting. These are all real facts that over time will sink in. The question is, will that be two years, or five years or 10 years?

Climate change is real and it is caused to a significant extent by human activity.

Our climate is changing. And while the increase in extreme weather we have experienced in New York City and around the world may or may not be the result of it, the risk that it may be - given the devastation it is wreaking - should be enough to compel all elected leaders to take immediate action.

If you're 29, there has been no global warming for your entire adult life. If you're graduating high school, there has been no global warming since you entered first grade. There has been no global warming this century. None

Unless we take action on climate change, future generations will be roasted, toasted, fried and grilled.

Global warming is the most prominent form of mass hysteria raging across the world today.