"When we harm nature, we are harming ourselves," says Aaron Bernstein, a doctor at Harvard Medical School and one of the authors of the upcoming book "Sustaining Life: How Human Health Depends on Biodiversity". "Few people realise that our health is directly tied to the health of the natural world," Bernstein told Tierramérica....Written for a general audience, "Sustaining Life" draws on the latest scientific evidence to make a persuasive case that the current extinction crisis, with species vanishing every day, is a serious threat to humanity equal to, if not greater than, climate change." » original news ...