Harrison Ford on biodiversity. Have a look at this reading exercise and quiz on endangered species. Check out one man's view on the future of our planet and the BBC's 10 grand challenges we'll face by 2015. Harrison Ford on biodiversity. Have a look at this reading exercise and quiz on endangered species. Check out one man's view on the future of our planet and the BBC's 10 grand challenges we'll face by 2015. 
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