Plans to end global warming Distribute to the driving of clear greenhouse gas emissions to zero (more or less a few gigatons). It doesn’t go well. CO2 The emissions reached a record level last year and, for the first time, the average temperatures on earth increased by 1.5 ° C above the pre-industrial levels. To limit global warming to 2 ° C, massive quantities of carbon dioxide will have to be sucked in the atmosphere and locked, according to the intergovernmental panel on climate change (IPCC).
There are old and new ways to do so. The old methods – growing more and more trees in temperate and tropical forests, supplying more carbon in soils – can be cheap, but they have limits. Forests burn, die from a disease or are reduced, releasing part of the carbon they store. Microorganisms end up breaking a large part of what is in the ground. Both are difficult to audit and forced by available land. Another option – Uloned minerals spread to fields – can solidify the airborne carbon. But like trees and soils, these approaches require a lot of land to flow a ton of carbon.
Enter the machines: several companies now deploy fans or high power pumps which chemically isolate the CO2 from air or sea water, then the pipe to systems that inject it underground.
But direct air capture systems (DAC) consume a lot of energy and reagents that currently produce toxic by-products. To make a significant breach in global warming, all known elimination methods – both conventional and new – will probably have to increase until their unwanted consequences limit new expansion.
What would it take to develop the DAC to several billion tonnes per year? Let’s take a look.
Where to bury the CO 2
Chris Philpot
Geologists have identified many tanks that could contain several tons of tons of injected co2 Underground for centuries. About 51 CO megatonnes2 are already stored each year and the announced plans would increase this seven in the next decade. DAC operations contribute to a tiny amount to this total; Essentially, all carbon capture and storage operations today inject2 recovered from the production or use of fossil fuels, not from the atmosphere. But the same type of injection infrastructure could be used for the DAC because it accelerates and the drops in using fossil fuels.
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