I read Mr Roulstone’s letter, Al Gore a ‘Giant of Science’? with some surprise. How can he believe, as he says, that ‘CO2 is the dominant cause of global warming’ based only on a ‘simple Google search’? If he believes that this is so, he must also believe that, despite the billions spent on propaganda urging emissions reductions, we have not been able to stop the inexorable rise in CO2. Because this is so, climate “doomers” such as he must interpret the evidence to conclude that humanity is already doomed by our changing climate. If it is already too late to do anything about climate change, w…