Geography and time periods cherry-picking. The US is not the world so this is irrelevant to a discussion re global warming. Pre-1960 in the US includes the Dust

Geography and time periods cherry-picking. The US is not the world so this is irrelevant to a discussion re global warming. Pre-1960 in the US includes the Dust Bowl droughts, a multi-year drought with a vicious positive reinforcement loop, exactly the kind of thing we want to avoid by addressing global warming.