James Hansen Quotes

I believe, along with Pope Francis and almost all scientists, that climate change is threatening this planet in horrendous ways, and that we have to be aggressive in transforming our energy system away from fossil fuel and defeat the Keystone Pipeline.

If enough of us stop looking away and decide that climate change is a crisis worthy of Marshall Plan levels of response, then it will become one.

There is only one possible route of action, Greenhouse gases have to be radically reduced and it has to happen worldwide. Until now, the US has kept its eyes shut to this emergency. Americans make up a mere 4 percent of the population, but are responsible for close to a quarter of emissions.

We're all agreed that climate change is one of the greatest and most daunting challenges of our age. We have a moral imperative to act and act now.

The warnings about global warming have been extremely clear for a long time. We are facing a global climate crisis. It is deepening. We are entering a period of consequences.

Climate change is a huge problem, an almost insoluble problem.

The truth is that climate change is presenting the greatest challenge humanity has ever faced.

It seems clear to me also that climate change is a problem which can no longer be left to our future generation.

Can we remain indifferent before the problems associated with such realities as climate change?

Doom yourself to horrific climate change by burning all that carbon and releasing all that CO2. Or power down society, reducing total energy usage around the planet. One leads to ecological collapse. The other is a reversion, in many ways, to poverty.

...climate change is accelerating. It threatens our well being, our security, and our economic development. It will lead to uncontrollable risks and dramatic damage if we do not take resolute countermeasures.

Coal is a portable climate.

All of us living in today's world are facing an enormous crisis - arguably the greatest that humanity has ever faced - in the form of man-made global warming; one can't be neutral at such a moment. It's like claiming to be neutral if you're living in Germany in 1933.

Climate change is a fact. Its consequences, damages and costs are already being felt around the globe.

What's happening to our world? Imagine the year 2000 and our ozone layer has vanished... Our planet has a fever and she is burning up - what will you do?

The downsides of fossil fuels, notably their geopolitical and environmental risks, are not fully reflected in their market prices.

Fossil fuel companies and their allies are funding a massive and sophisticated campaign to mislead the American people about the environmental harm caused by carbon pollution.

Reducing and removing greenhouse gas emissions spares our planet from the well-documented degradation that we are witnessing on a global basis.

We got a dying world around us.

We're putting 70 million tonnes of pollution into the atmosphere every day, trapping an enormous amount of extra heat from the sun inside the earth's atmosphere. It's threatening to push the planet past a tipping point beyond which climate change would be difficult to stop

Climate change is due to the use of energy for industrial growth, which has been and is overwhelmingly based on fossil fuels.

Climate change is the greatest threat of our time.

Climate change is the greatest threat to our existence in our short history on this planet. Nobody's going to buy their way out of its effects.

Burning natural gas will not save us from climate change. It's the same as burning any other carbon-based fuel.

Humanity is sitting on a time bomb. If the vast majority of the world's scientists are right, we have just ten years to avert a major catastrophe that could send our entire planet's climate system into a tail-spin of epic destruction involving extreme weather, floods, droughts, epidemics and killer heat waves beyond anything we have ever experienced - a catastrophe of our own making.