Remove CO2 from the air

If man had started to melt down the rise in global warming gases 20 years ago, the annual decline would be two percent.

If man had started melting down the rise in global warming gases 20 years ago, a two percent reduction by 2030 would put us on the right track.

To save the world from the devastation of climate change, cutting carbon pollution is not enough – CO2 It should be released from the air and buried, a UN report is expected to say on Monday.

If people had started to avoid green gas emissions 20 years ago, a two percent reduction by 2030 would put us on the right track. Difficult, but doable.

But emissions rose by about 20 percent to more than 40 billion tonnes of CO2 in the year 2021.

That’s why emissions are falling by six to seven percent a year to prevent a breach of the Paris climate agreement to end global warming by “below “Two degrees Celsius compared to the early stages of the industry.

Staying below the safest aspirational threshold of 1.5C means a decrease in altitude.

For comparison, the global economic downturn due to COVID in 2020 saw “only” a 5.6 percent decrease in CO.2 release.

Hence the need for carbon dioxide emissions (CDR), or “negative emissions”, to be highlighted in the UN Intergovernmental Panel on Climate Change (IPCC) report.

Even under the most stringent carbon emissions trends, there are billions of tonnes of CO2 It will have to be translated from the sky every year by 2050, and the total number of hundreds will be 2,100 billion.

Today, however, CO2 There is nowhere near these levels. The largest aerospace industry in the world shifts the year what a person emits in three to four seconds.

There are at least ten CDRs on the table, with different powers and prices.

Using bioenergy

Most of the hundreds of models that leave a game plan for future health care are largely responsible for an unhealthy emission effect called BECCS, or bioenergy with carbon capture and carbon sequestration. care.

In short, here’s the food: grow trees, burn them for energy, and plant CO2 underground, on an abandoned mineshaft, for example.

Restoring deforestation and replanting trees to increase and conserve CO2 as they grow is critical to development trends.

Restoring deforestation and planting trees to capture and retain CO2 as they grow is also important to development scenarios that have net-zero emissions.

But what is happening in the paper (or the so -called combined examples), has not materialized in reality.

One of the smallest BECCS commercial offices in the world, in the UK, was downgraded last year from the S&P Clean Energy Index for not meeting sustainability requirements.

“I didn’t see a BECCS boom,” said Oliver Geden, a senior fellow at the German Institute for International and Security Affairs and a specialist at CDR.

Planting trees

Replanting and planting trees to store and conserve CO2 While they are growing rapidly with development trends that will have net-zero emissions, whether in 2050 or later.

Many industries, including fossil fuel companies, rely heavily on carbon emissions programs related to forest rejuvenation to compensate for continued carbon pollution.

But much of the country needs to put a lot of emphasis on CO2 levels through tree planting – up to twice that of India – can compete with other major factors, such as growing food and biofuel plants.

Biodiversity can be a problem, especially in savannahs that have been converted to monoculture gardens.

Newly planted forests can suffer from wildfires that are often exacerbated and intensified by rising temperatures, resulting in the release of their stored CO.2.

‘DACCS’

One of the youngest CDR technologies is one of the hottest: air capture and storage.

In many ways, DACCS is a chemical process that extracts directly from the atmosphere, turning it into a solid or solid form underground.

Because CO2 in a small space – hundreds of millions of dollars – it is a very intensive and expensive process.

Photograph showing different methods of removing carbon from the atmosphere

Photograph showing different methods of removing carbon from the atmosphere.

DACCS has benefited from a wave of professional support.

Last year, Tesla CEO Elon Musk presented the $ 100-million X-Prize for a new CO.2 Energy technology, and Breakthrough Energy founder Bill Gates has opened a company to turbocharge during its development.

How quickly it can increase, and at a cost, remain open questions.

Violence is increasing

Improvements in the excavation and crushing of mineral -rich rocks actually burn CO.2then spread it out by land or by sea.

He hopes to prolong a process that routinely dissects geological times of tens of thousands of years.

Silicate rocks with minerals rich in calcium and magnesium but not deficient in metal ions such as nickel and chromium are the best material for the process.

But again, it is not clear if the increase in time, or cost, can be increased.

Marine activities

More than 30 percent of human carbon emissions are made, and scientists are trying ways to increase that capacity.

One way to increase ocean alkalinity is by directly combining natural or synthetic alkaline minerals, or the electrochemical action of the ocean.

Another way, known as marine fertilization, is to increase the thickness of small phytoplankton that produce and store natural carbon through photosynthesis, just like plants do on land. The addition of nitrogen or iron stimulates phytoplankton growth.

The main problems here are related to unintended consequences on ecosystems.


Climate: Emission of CO2 from the atmosphere is no longer an option


© 2022 AFP

Directions: There is no last way: CO2 is extracted from the sky (2022, April 1) retrieved April 1, 2022 from https://phys.org/news/2022-04-longer-resort-co2-air .html

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