. . . a jostling scrum of office buildings so mediocre that the only way you ever remember them is by the frustration they induce - like a basketball team standing shoulder to shoulder between you and the Mona Lisa.

If you chuck away too many things, you end up discovering there was value in them.

If you think about your and my grandchildren, this is what really worries me. I don't want them - if I'm still alive by then - to say, 'Why didn't you do something about it?', when you could have done.

One of the main reasons for the conflict in Syria, and the terrorism that it's spawned, is climate change and drought.

The world's forests need to be seen for what they are - giant global utilities, providing essential public services to humanity on a vast scale. They store carbon, which is lost to the atmosphere when they burn, increasing global warming. The life they support cleans the atmosphere of pollutants and feeds it with moisture. They act as a natural thermostat, helping to regulate our climate and sustain the lives of 1.4 billion of the poorest people on this Earth.

Conservation must become before recreation.

Organic farming has been shown to provide major benefits for wildlife and the wider environment. The best that can be said about genetically engineered crops is that they will now be monitored to see how much damage they cause.