The forcings that drive long-term climate change are not known with an accuracy sufficient to define future climate change.

We're running out of time.

Imagine a giant asteroid on a direct collision course with Earth. That is the equivalent of what we face now with climate change, yet we dither.

We are on the precipice of climate system tipping points beyond which there is no redemption.

It would be immoral to leave young people with a climate system spiraling out of control.

Global warming has already triggered a sea level rise that could reach from 6 metres (19.69 ft) to 25 metres (27.34 yards).

What we are doing to the future of our children, and the other species on the planet, is a clear moral issue.

How long have we got? We have to stabilize emissions of carbon dioxide within a decade, or temperatures will warm by more than one degree... We don't have much time left.

What has become clear from the science is that we cannot burn all of the fossil fuels without creating a very different planet.

It's as certain that as long as fossil fuels are the cheapest energy, we will just keep burning them.

We have at most ten years—not ten years to decide upon action, but ten years to alter fundamentally the trajectory of global greenhouse emissions.

I want to disabuse people of the idea that knowledge is power. Knowing how to get to Detroit is not the same thing as having the bus fare.

For by this very fact, individuals confirm the system, fulfill the system, make the system, are the system.

Kate was never going to understand the extent to which men were stupid.

Like dreams, statistics are a form of wish fulfillment.

It's only through Christ that we can take full advantage of God's mercy and forgiveness through repentance in Jesus' name.

Kind words do not cost much. Yet they accomplish much.

My tattoo is a cross, a rose and a shark. A cross is a cross, a rose like love and a shark is a pretty tough animal.

The changing climate is a threat to human rights.

One thing I've found in any project is almost universally about three quarters of the way through - or maybe a little father, maybe seventh eighths on the way through - any project will explode.

It's good to find common ground with people. When you find common ground and you see things from other people's perspective, you can have a voice in their lives, you can have an influence.