Brain Food: Earning curve - Back to nature

Global whale-watching industry, value p.a. £530m
WWF-UK, income ('05) £39m
The late Steve Irwin, crocodile hunter ('05) £1.6m
Administrator, Invertebrate Conservation Trust, p.a. £15k
Street fundraiser, Greenpeace, per hour £8
Sir William Proby, chairman, National Trust, salary £0