Peter Onesta, Johannesburg
Readers might like to know that, without being a climate change “denier”, David Gunnlaugsson points out that when Iceland was first settled, it was covered in forests (The Spectator, 23 November 2019). Also that the OK glacier has been receding for more than a century. However, some glaciers are now much larger than they were more than a millennia ago. The writer is a former prime minister of Iceland.
You might also consider two graphs shown in Martin Cohen’s Philosophy Problems. The first shows temperature rising over the past 150 years, the second covers over more than 1 000 years, showing that the increase in about 1000 AD is well above the year 2000, but reached a low in about 1600. It shows that the climate is always changing.
