Mr C. Southgate, referring to my letter of January 24 (Climate Action Must be Taken), says I “drag out the same old alarmist views”. He writes in support of M. Patchett’s letter “Trillions Wasted on Climate Emergency” (December 28). Oh dear! The most eminent body of scientists in the UK is the Royal Society. In March 2020 it published Climate Change: Evidence and Causes (https://royalsociety.org/topics-policy/projects/climate-change-evidence-causes/) The following quotations convey its powerful message. “Greenhouse gases affect Earth’s energy balance and climate … Human activities have added g…