Some of these species that are now no longer with us were killed off by a fungal disease that was moved around the planet by people.

Though it might be nice to imagine there once was a time when man lived in harmony with nature, it’s not clear that he ever really did.

If in your lifetime you watch a species go extinct, or plummet almost to the point of extinction, that is a sign that something really serious is going on.

No matter what Donald Trump says, it's clear that global warming is rapidly changing conditions on our planet.

What are the Chinese doing, what are we doing, what are - so we need, both the developed world and the developing world, really need to be moving, once again, getting all your arrows in the same direction if you want to have any impact.

Some of these species that are now no longer with us were killed off by a fungal disease that was moved around the planet by people.

Most of the world's major waterways have been diverted or dammed or otherwise manipulated - in the United States, only two per cent of rivers run unimpeded - and people now use half the world's readily accessible freshwater runoff.