The need for drastic and urgent solutions to reduce CO2 in the atmosphere has generated several technological-based corrective proposals, among which there is the capture and storage of carbon. But this technology is being questioned.
According to the recent special report drafted by the Intergovernmental Panel of Experts on Climate Change of the UN (IPCC), called “Global Warming of 1.5ºC”, the evidences that we already have climate change on are indisputable and alarming. Among the drastic solutions to reduce CO2 at 0.5ºC, from 2 to 1.5ºC, carbon capture and storage is considered, although it is a technology that generates serious doubts.
Because of human activities, global warming increases at a rate of 0.2ºC per decade. This increase will end, if nothing is done to stop it, placing 2ºC above the current temperature in 2050. This will cause changes in the climate that will affect large areas of the planet, which will be subject to increases in frequency, intensity and amount of rainfall in different regions. At the other extreme, there will also be more episodes of extreme heat and prolonged drought.
The increase in the level of the sea and oceans, another of the negative impacts of the greenhouse effect, would endanger large areas of the coastal population. It is also estimated that the Arctic sea ice could be lost one summer in ten or in every hundred, depending on whether the warming is 1.5 or 2ºC above the current temperature.
With these forecasts, the great coral barrier would also be affected, which in the worst scenario would entail its total extinction. For all this, the reduction of 0.5ºC is essential, and carbon capture is seen, a priori, as a quick and effective solution to stop the devastating blow of the dramatic changes that we already have.
What is the capture and storage of CO2?
This technique consists, first, of separating carbon dioxide (CO2) from other gases. Once captured, it is compressed to be transported through gas pipelines or liquefied gas container ships.