Do we have to wait until a disaster overwhelms us before we make the radical changes necessary to protect our world for future generations? That is the vital challenge of sustainable development. If we act now there is much that can be saved which will otherwise disappear forever

Eighty percent of the people of Britain want more money spent on public transport — in order that other people will travel on the buses so that there is more room for them to drive their cars.

Poverty is considered quaint in the rural areas because it comes thatched.

Do we have to wait until a disaster overwhelms us before we make the radical changes necessary to protect our world for future generations? That is the vital challenge of sustainable development. If we act now there is much that can be saved which will otherwise disappear forever

A tolerant society is one in which we criminalise an activity only as a last resort. Toleration is not just about allowing people to do things of which we approve, but about allowing them to do things of which we do not approve.

Global climate change needs global action now. The alarm bells ought to be ringing in every capital of the world.

A lot of work and money has been spent on astronomy and yet we have not found life. So we are rare, and rare things tend to be fragile and you have to be careful about them