DAVID Davies (Argus article, December 31) seems to prove the old adage that a little knowledge is dangerous.

The fact that climate naturally changes to a small extent can be seen on the many temperature reconstructions of the past 1,000 years. However, the level of warming experienced from the late 20th century onwards is unprecedented in the past 1,000 years. The Arctic is melting and extreme weather events are happening more frequently.

The intergovernmental panel on climate change 2007 report concluded that it was at least 90 per cent certain that emissions of greenhouse gases caused by man rather than natural variations were warming the planet’s surface. If you were told by experts there was a 90 per cent plus chance of a plane crashing, you would not board it. This metaphorically is the plane Mr Davies wants us to board in hope that the world scientific consensus is wrong and he is right.

Andrew Baker Glanmoor Monmouthshire