Climate scientists have proposed to fight global warming by spraying in an atmosphere of diamond dust. This is a more secure method of man-made climate cooling, rather than spraying sulphate aerosols, the authors of articles in the journal Atmospheric Chemistry and Physics. Brief study says Nature News.
To combat global warming is now widely discussed new ways of Geo-engineering – for example, spraying a mixture of sulfates in the sky with water, so that she reflected and scatter sunlight which simulates the cooling caused by the volcanic eruptions. However, scientists from Harvard offered more environmentally friendly composition of the mixture – dust from the nano sized particles of diamond or aluminum oxide.
Despite the high cost of this method of diamond control solar radiation is not unrealistic. After contact with sulfates into the atmosphere, it forms sulfuric acid, which damages the ozone layer. Furthermore, sulfates absorb light at certain frequencies because of which the lower part of the stratosphere is heated – is, in turn, in an unpredictable way affect the climate.
Finally, sulfates scatter light: it will accelerate the growth of plants, but will reduce the efficiency of the solar cells. Alumina and diamonds will not lead to problems: they spray less impact on the ozone layer, the stratosphere heats up less and does not increase the amounts of scattered light reaching the Earth’s surface. Diamond dust, according to the calculations of researchers, will be 50 percent more efficient alumina. Although diamond dust is much cheaper whole diamonds about one hundred dollars per kilo, to balance even a few percent of greenhouse gas emissions will need to spray every year hundreds of thousands of tons and it will cost several billion dollars.
Nevertheless, the authors of the project are confident that in the future (2065) spraying 450 thousand tons will cost each of the ten billion people on Earth just five dollars.