I agree, Alan. Sir David Attenborough is someone I have monumental respect for... he has done more to bring the environmental crisis to public attention than anyone else, and we owe him an enormous debt.
Agree here too. He has done more for bringing the variety, wonderfulness and unfortunate the plight, of life on Earth and the Earth itself to the average person than any other person in the country and possibly the world.
The link is to the last couple of minutes of the last episode(New Worlds) of The Living Planet. This episode was first broadcast in April 1984 and the concerns raised are probably more relevant now than they were then.