Global Warning

It was in 1966 that I first noticed it.

I was working on gas analysis, using a Haldane analyser, and measuring the atmospheric air itself.

This was in Cambridge, so I would have expected the published norm.

However, try as I did, sampling in town and in the countryside, I could not get the carbon dioxide levels that Haldane himself had got in the late 19th Century. Mine were always higher.

I reported this and kept on re-measuring.

No change.

Carbon dioxide was well above Haldane’s .03%.

This was when I started thinking about the possible causes.

Human activity.