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The arrival of plants can only reduce the total CO2 levels because they metabolize carbon and oxygen. Plants don't make CO2 appear which wasn't there, they only absorb and release ambient CO2. Two ways that the ocean can absorb more CO2 through a higher atmosphere concentration, and through acidification of limestone which can dissolve the limestone. If an ...

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The problem faced by so many geo-engineering approaches is that the scale of the problem is so great. We are losing approximately 300 cubic kilometers of ice just in the Artic each year (trends in Artic ice volume). 300 cubic kilometres of ice is 3 x 10$^{11}$ metric tons of water. Lets imagine a series of pumps that are placed at the North pole and raise ...

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We don't know, and that's why we have to develop it. that's the thing about undeveloped sciences we don't know what many of the risks are, Its a case of knowing what we don't know. Which is one big reason to develop it, so we don't cause harm accidentally. Lets be clear we already are geoengineering right now, by driving cars, changing the landscape, ...

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I think the third paragraph of the article hints at what might be the thinking. In the next five years, the total area covered by artificial rain or snowfall will reach 5.5 million sq km, while over 580,000 sq km (224,000 sq miles) will be covered by hail suppression technologies. The statement added that the program will help with disaster relief, ...

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