There are two parts of the global environmental problem, which are driving us towards extinction.
First is our climate, which is changing rapidly as a result of human activity.
Second is our ecology - the web of organisms and natural environments on earth that provide our food and air.
Both are very interconnected and together they form our life support system, without which we could not feed ourselves, or even breathe. At the moment, both are under threat in a way we could never have imagined.