Middle Ages were warmer than today, say scientistsBy Robert Matthews, Science Correspondent (Filed: 06/04/2003) Claims that man-made pollution is causing "unprecedented" global warming have been seriously undermined by new research which shows that the Earth was warmer during the Middle Ages. From the outset of the global warming debate in the late 1980s, environmentalists have said that temperatures are rising higher and faster than ever before, leading some scientists to conclude that greenhouse gases from cars and power stations are causing these "record-breaking" global temperatures. Last year, scientists working for the UK Climate Impacts Programme said that global temperatures were...