Agence France-Presse: Less than half of Britons believes that human activity is to blame for global warming, according to a poll carried out for The Times newspaper and published on Saturday. Only 41 percent accept as an established scientific fact that global warming is taking place and is largely man-made. Almost a third, or 32 percent, believe that the link is not yet proved; eight percent say it is environmentalist propaganda to blame man and 15 percent believe the world is not …