I watched the second part of Are We Changing Planet Earth? last night. David Attenborough put on his serious face and acted naive as various scientists told him how doomed we are.

It's scary stuff and something has to be done. There was a quote from the NZ Greens about politicians planning ahead as if we lived on an infinite flat earth with limitless resources. The fact is that we live on a small planet and when we mess it up we have nowhere to go. Global warming will lead to more extreme weather, displacing or killing millions of people. As millions in the second and third worlds demand their modern luxuries the change will accelerate.

Everyone can do something to help, and if we all do something it will make a difference. Many of the things people could do either cost nothing or will save them money, it just requires a little thought. Ultimately we may have to do without some things. I won't list all the standard tips here again. They can be found in plenty of places.

One of my favourite quotes is, 'we don't inherit the world from our parents, we borrow it from our children'.