nwtk2007 wrote:
In the original "consensus" survey, the "scientists" were asked to estimate the "chances" that the "warming" was caused by man. Anyone who said there was even a 5% chance that man is contributory was deemed to be part of the "settled science" that c*****e c****e is man-caused. I was part of that survey. We had a pretty good laugh about it at the time. Over the years I have seen many, many who have become convinced of one thing; we have a minuscule effect and none of that effect is related to CO2 emissions.
In the original "consensus" survey, the ... (
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"We're taking CO2 out of the system," says carbon-capturing concrete maker Carbicrete
Jennifer Hahn | 15 June 2021 14 comments
Montreal company Carbicrete has developed a method for sequestering carbon in concrete, claiming its product captures more carbon than it emits.
However, the process relies on emissions produced by other industries, so it is helping to reduce the amount of additional CO2 going into the atmosphere rather than actively removing it from the atmosphere.
But as CO2 is captured from the sky via direct air capture (DAC) companies such as Climeworks becomes more affordable, concrete could start to play a part in lowering concentrations of atmospheric carbon.
"We'd love to get it from a direct air capture unit," Stern said. "We're not there yet just because the industry is not there yet but it's certainly well-positioned for us."
The technology could eliminate hundreds of megatons of emissions
Carbicrete, which was founded in 2016, licenses its technology to concrete manufacturers who can integrate it into their existing production processes for concrete masonry units (CMUs) and precast panels.
In collaboration with Quebec manufacturer Patio Drummond, the company is building up its production capabilities to 25,000 CMUs per day while the first building using material is set to be built in Canada at the start of next year.
The technology cuts out the need for calcium-based cement, a key ingredient in traditional concrete that is responsible for around eight percent of all global CO2 emissions.
"It's negative emissions," Carbicrete CEO Chris Stern told Dezeen. "We're taking CO2 out of the system every time we make a block."
Concrete locks carbon away "forever"
The company is one of many that is racing to find low-carbon or carbon-free alternatives to traditional concrete but is one of the only ones claiming to have achieved negative carbon.
Instead of cement, Carbicrete's system combines waste slag from the steel industry plus carbon captured from industrial plants that would otherwise have gone into the atmosphere in a process known as mineral carbonation.
"We're taking it from there and then injecting it into concrete and getting rid of it forever," Stern said.
More carbon is captured during the production process than is emitted during the manufacture of the concrete, making the resulting concrete carbon-negative according to Stern.
https://www.dezeen.com/2021/06/15/carbon-capturing-concrete-carbicrete/