Unknown to many, Lady Margaret has been doubting global warming science for many years now. The reason that few know this is that she was long identified to be a global warming "advocate", in fact one of the first. When she changed back to the right course, no blip was seen or heard.
She voiced precisely the fundamental doubts about the warming scare that have since become familiar to us. Pouring scorn on the "doomsters", she questioned the main scientific assumptions used to drive the scare, from the conviction that the chief force shaping world climate is CO2, rather than natural factors such as solar activity, to exaggerated claims about rising sea levels. She mocked Al Gore and the futility of "costly and economically damaging" schemes to reduce CO2 emissions. She cited the 2.5C rise in temperatures during the Medieval Warm Period as having had almost entirely beneficial effects. She pointed out that the dangers of a world getting colder are far worse than those of a CO2-enriched world growing warmer. She recognised how distortions of the science had been used to mask an anti-capitalist, Left-wing political agenda which posed a serious threat to the progress and prosperity of mankind.In other words, long before it became fashionable, Lady Thatcher was converted to the view of those who, on both scientific and political grounds, are profoundly sceptical of the climate change ideology. Alas, what she set in train earlier continues to exercise its baleful influence to this day. But the fact that she became one of the first and most prominent of "climate sceptics" has been almost entirely buried from view.