What will life be like when Baby Grace is a young woman? 
Since returning home I've struggled with an assignment I've given myself: to answer a friend's query why I'm preoccupied with global warming. What should I say in my column? That Richard Leakey, the eminent pathologist, speaks of a "sixth Extinction" which, unlike to preceding five, is human-caused and quite likely will wipe out all of us along with the species we drive into oblivion? That Laurence Smith's world of 2050 is wracked with...
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