Pumping out air is costly; pumping out natural CO2 to make room for man-made CO2 is pointless; and releasing rotten egg gas or salty water on the surface would create a real problem, unlike the imaginary threat from CO2.
In some cases CCUS may require the removal of fresh water to make space for CO2.
Producing fresh water on the surface would be seen as a boon by most locals. Pumping out salt water to make space to bury CO2 would create more problems than it could solve.
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Naturally, some carbon dioxide buried under pressure will dissolve in groundwater and aerate it, so that the next water driller in the area could get a real bonus – bubbling Perrier Water on tap, worth more than oil.
Then there is the dangerous risk of a surface outburst or leakage from a pressurised underground reservoir of CO2. The atmosphere contains 0.04% CO2 which is beneficial for all life. But the gas in a CCUS reservoir would contain +90% of this heavier-than-air gas - a lethal, suffocating concentration for nearby animal life if it escaped in a gas outburst.
Pumping gases underground is only sensible if it brings real benefits such as using waste gases to increase oil recovery from declining oil fields – frack the strata, pump in CO2 and force out oil/gas. To find a place where you could drive out natural hydro-carbons in order to make space to bury CO2 would be like winning the Lottery – a profitable but unlikely event.
Normally however, CCUS will be futile as the oceans will largely undo whatever man tries to do with CO2 in the atmosphere. Oceans contain vastly more CO2 than the thin puny atmosphere, and oceans maintain equilibrium between CO2 in the atmosphere and CO2 dissolved in the oceans. If man releases CO2 into the atmosphere, the oceans will quickly absorb much of it. And if by some fluke man reduced the CO2 in the atmosphere, CO2 would bubble out of the oceans to replace much of it. Or just one decent volcanic explosion could negate the whole CCUS exercise.
Increased CO2 in the atmosphere encourages all plants to grow better and use more CO2. Unfortunately natural processes are continually sequestering huge tonnages of CO2 into extensive deposits of shale, coal, limestone, dolomite and magnesite – this process has driven atmospheric CO2 to dangerously low concentrations. Burning hydrocarbons and making cement returns a tiny bit of this plant food from the lithosphere to the biosphere.
Regulating atmospheric carbon dioxide is best left to the oceans and plants – they have been doing it successfully for millennia.
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The only certain outcome from CCUS is more expensive electricity and a waste of energy resources to do all the separation, compressing and pumping. Unscrupulous Coal industry leaders love the idea of selling more coal to produce the same amount of electricity and electricity generators would welcome an increased demand for power. And green zealots in USA plan to force all coal and gas plants to bury all CO2 plant food that they generate. Consumers and taxpayers are the suckers.
Naturally the Greens love the idea of making coal and gas-fired electricity more expensive. They conveniently ignore the fact that CCUS is anti-life – it steals plant food from the biosphere.
Global Warming has never been a threat to life on Earth - Ice is the killer.
Glencore directors supporting this CCUS stupidity should be condemned for destructive ignorance.
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