For each of our actions there are only consequences.

One pound of uranium is worth about 3 million pounds worth of coal or oil.

By the end of this century, climate change will reduce the human population to a few breeding pairs surviving near the Arctic.

There aren't just bad people that commit genocide; we are all capable of it. It's our evolutionary history.

There is no clear distinction anywhere on the Earth's surface between living and nonliving matter. There is merely a hierarchy of intensity going from the 'material' environment of the rocks and the atmosphere to the living cells.

Nowadays if you're dependent on a grant - and 99% of them are - you can't make mistakes as you won't get another one if you do.

For each of our actions there are only consequences.