I would like to thank Clayton Mitchell, NZ First MP, for his column: Climate change: a balanced perspective needed (The Weekend Sun, January 31, page 22).

About 70 years ago, my dad, a commercial fisherman, carved marks in rock on the northern Manukau Harbour shoreline and I can assure you that the sea level hasn't risen. Also, having worked with marine engines, I know that in the 1990s, the new engine designs dropped the emission level from 165 - 180g/kwh to between 16 - 19g/kwh or approximately one tenth of what it had been.

Road transport emissions has dropped significantly as well, so in essence there can only be lessening impact from man-made pollution. I believe the climate is changing all the time, but it's definitely not man-made.

Clayton notes, regarding some climate changers, that a concerning trend of absolutism and indoctrination from the politically correct left, and students will be fed so-called absolute science.

I've known for a while that socialist elements in the UN and other sources have been behind this push to indoctrinate. Watch out for taxes and levies on farms and businesses that will bring high food and services costs. It has already begun!

J Fairburn, Katikati.