I hope that in future Congresses there will reemerge a recognition that climate change is a reality that our policies to meet our energy needs must also deal responsibly with environmental issues including the damage caused by greenhouse gas emissions.

There are more effective ways of tackling environmental problems including global warming proliferation of plastics urban sprawl and the loss of biodiversity than by treaties top-down regulations and other approaches offered by big governments and their dependents.

There is no 'need' for us to eat meat dairy or eggs. Indeed these foods are increasingly linked to various human diseases and animal agriculture is an environmental disaster for the planet.

There are a tremendous amount of environmental issues that are on the table.

If there are more and more environmental refugees they are going to end up on your doorstep too.

There's no longer any surprise in noting that China has grave environmental problems.

Fracking is doable if there's full disclosure of all chemicals used. Secondly science dictates the policy rather than politics. Third there's collaboration between environmental groups and the natural gas industry.

But as environment minister I am very interested in a thriving German automobile industry because I can only pay for the rising costs of environmental protection at home and abroad if there are people in Germany with jobs and who pay taxes.

On the environmental front there's concern about global warming and high levels of carbon dioxide and trees take in CO2 and store carbon.

There's so many issues tied to the meat industry. I mean social environmental humanitarian - all of them. I know that when I'm eating that I'm not hurting the planet I'm not hurting other people on this planet I'm not hurting animals... and I'm not hurting nature.

More than ever before there is a global understanding that long-term social economic and environmental development would be impossible without healthy families communities and countries.

There is no question that photography has played a major role in the environmental movement.

There are nuclear weapons in China Iran Korea and Pakistan. It wouldn't take much to send a couple of warheads off on this planet somewhere that would cause a lot of environmental damage then if you have got someone who wants to retaliate you have real problems.

I don't think it's too hippie to want to clean up the planet so you don't wind up dying of some kind of cancer when you're 45 years old. It enrages me that these big cancer-research organizations can't be bothered to man the front lines of environmental protest.

All we can hope for is that the thing is going to slowly and imperceptibly shift. All I can say is that 50 years ago there were no such thing as environmental policies.

I always thought we had an environmental problem but I hadn't realized how urgent it was. James Lovelock writes that by the end of this century there will be one billion people left.

There are two problems for our species' survival - nuclear war and environmental catastrophe - and we're hurtling towards them. Knowingly.