ON A cold winter night put your head under the bedsheets and breathe out.

The warm carbon dioxide in your breath will soon warm up the bed.

In the same manner, CO2 from all sources on Earth (us, our vehicles, power stations, etc) warms our planet and forms a blanket round it to retain the heat.

Scientific measurements show the level of CO2 in the atmosphere is increasing and global temperatures are increasing with it.

Greta Thunberg does not claim to be a scientist, but she has recognised their obvious conclusions and does not want to see her future blighted by rapid and devastating changes in climate, for which we are singularly unprepared.

D Aikman