We all think that Extinction Rebellion and Animal Rebellion are nutters, well they are pussycats compared to this lot.
Some scientists want to refreeze the polar ice caps using geo engineering by spraying them with microscopic sulphur dioxide particles to shade the surface and reflect the sun's rays. They will spray 13 million tonnes of the stuff in the relative spring and summer of seasons from above the Shetlands and below the Falklands using 125 military air-to-air refuellers, and the air time of these tankers is equal to two days of global air travel, 175,000 flights, with all the greenhouse gasses they produce.
We animals and plants have been bio and geo engineering the planet and atmosphere for millennia, but over long periods to let things adjust. This new idea is over the short term, even shorter that our current geo engineering with climate change, and we have all seen how hard it is to cope with CC.
There are problems, though. The modelling says it is all OK, but we alll know just how bad current modelling can be. We cannot even predict next month's weather for a relatively small region with any degree of accuracy never mind continental sized polar regions for the future.
Then there are the accidental compounds which could be produced. Sulfur dioxide can mix with water vapour in the upper atmosphere to produce Sufurous acid and a free hydrogen atom. Sulfurous acid is a mild disinfectant and reduciong agent - it kills things. However, if it gains another oxygen atom in the upper atmosphere, say from ozone, it becomes Sulfuric acid - acid rain. Most of it will fall on the boreal forest that wraps right around the world in the northern hemisphere.
Even if it were to work as planned it will not stop more and more of us using up the world's finite resopurces at an ever increasing rate. No word on that, surprise, surprise.