I've been arrested a few times. The most high-profile instance was when protesting at the fracking site in Balcombe. It's an industry which will undermine our chances of tackling climate change.

The squandering of oil and gas is associated with one of the greatest tragedies, not in the least resolved, which is suffered by humankind: climate change.

If we don't succeed on the climate change agenda, we risk getting feedbacks that undermine everything else.

Climate change demands a collective response. We can't expect other countries to act if we don't.

Climate change is obviously happening and there is obviously a man-made contribution.

When I have been travelling around to speak in different countries, I am always offered help to write about the specific climate policies in specific countries. But that is not really necessary. Because the basic problem is the same everywhere.

You always have to be worried about something that is considered a so-called 'scientific theory' that fits every scenario. Climate change, as they've defined it, can never be disproved.

I think the days of the climate deniers are over. To deny basic science is to risk the trust of the general public.

Due to climate change, wildfires are growing in size, frequency, and intensity, and wildfire seasons are becoming longer.

The Climate Risk Managers can be trained in the science and art of managing uncertain rainfall patterns leading to drought or flood.

The idea of 'climate' - in quotation marks - is never going to be the issue. It's always going to be a local, human issue. And so to the extent that you put 'climate' on the ballot, that's never going to move the needle.

When it comes to climate change and the environment, President Donald Trump is plain wrong.

Climate change is obviously happening and there is obviously a man-made contribution.

The climate is changing; I don't think you can deny that. But climate has always changed.

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

In order to properly measure the impacts of climate change on our Financial system they must first be identified and disclosed.

As Americans, we have traditionally been the optimists sporting the 'can-do' attitude. But when it comes to addressing climate adaptation and resiliency, we seem to be more 'can't do' than 'can-do.'

The oil companies, the big polluters, and the climate deniers are incredibly powerful. They will do everything they can to protect their profits.

I am saying to Canadians, there is no climate emergency in this country.

I want to ensure and the Government wants to ensure that Australia is well prepared to tackle dangerous climate change with a scheme which is both responsible and which meets our international commitments.