Many are contradictory. Ah, clearly global warming in action except that even scientists convinced the earth is heating up generally concede it's happening so slowly that attributing to it sudden sharp temperature increases is preposterous. More so is blaming global warming for terrible winter weather. Likewise, global warming has taken the rap for long-term water levels both rising and falling, and for both droughts and floods. Vice President Al Gore blamed it for the recent forest fires in Florida, as if this were some new phenomenon.
Environmentalists often leap to conclusions.
Trends in human health problems have always been fair game for ax-grinding greens. And in fact, even adjusted for age, cancer rates overall did rise through much of the 1980s. Tossed into the lineup were power lines, cellular phones, breast implants and other potential villains. Yet studies costing countless tens of millions of dollars failed to show any conclusive link between any of these and human cancer. Now we know that cancer rates have been in decline since 1990, exactly in line with the earlier-diagnosis theory.