For a long time I’ve been suggesting that reductions in the level of pollution from the 1970s clean air acts was likely to have caused some if not all the warming from the 1970s to the point that clean up effectively came to an end which is around 2000.
And if you look at almost every early picture of the past (before 1970s), what you will see is a clear smog haze created from the burning of coal high in sulphur.
It is hard, not to miss the obvious impact of pollutants in the past, unless that is, you are intentionally ignoring them because your real agenda is not to clean up pollution, but to destroy the modern industrialised economies of the West.
When looking at global temperatures I discovered what is clearly the smoking gun in that the warming from 1970-2000s occurred, not globally as would occur for CO2, but in regional hotspots about 3days downwind from the large 1970s economic zones as shown below.But this issue has become very problematic for those trying to ignore the massive changed due to the clean air acts of the 1970s. Because as the pause continues year after year, and the public just aren’t buying their made up data with the “added warming” flavour, on the one side alarmists want to use the recent increase in Chinese pollution to explain the lack of recent global warming – so a lot of work has gone into proving “it was the Chinese wot done it”. But by the same token, if Chinese pollution could stop warming now, then the reduction in pollution in other areas would cause warming.
So it’s great to see that Climate Depot have understood that 1970s pollution is a perfectly viable explanation of much of recent climate:
- Up to 1970s we saw increasing economic activity with associated pollution and we saw the global cooling scare
- From 1970-2000 concerted efforts were made by the advanced countries to clean up pollution and as a result we saw the cooling-pollution removed which resulted in a very predictable and short-term increase in temperature
- From 2000 not only was the effect of 1970s clean air acts coming to an end but there was increasing pollution from countries like China – and we saw the Pause.
And the alarmists ask? “How can you explain 20th century warming without CO2?” The real problem is how do you explain 20th century climate and the very regionalised nature of 1970-2000 with CO2!
The New/Old Consensus?! Pollution is ‘helping to cool the climate’ – Cleaning Up Air Pollution May Strengthen ‘Global Warming’