I can't wait until they makes these no cost, low-maintenance, and self-replacing. Oh man, just think of how easy it would be to fix our climate issues!
this post was submitted on 30 Aug 2025
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Greenwashing is an issue, but so is avoiding complicated nuance by simply laughing at an idea without understanding it.
The country I live in is mostly powered by renewables, they focus on reducing emissions, then capture at source, but they are currently having a healthy nuanced debate on whether to implement something like this.
The original set of these were built without reguard to their specific carbon offset as they were built to be exerpimental and to experiment with the technology. As with almost anything on engineering.
Modern ones have to go through a Life Cycle Assement (LCA) where they figure out when the break-even point will be before they are built and they are typically built where there is renewable energy sources. They must be net carbon negative for government subsidy.
Arizona and Texas are mostly desert where trees may not be a viable option but they have solar and wind farms. Deforestation is awful and reforestation can be a great option but these two climates in particular have not had forrests for thousands of years.
The largest one in Texas is owned and operated by an oil company, likely powered by oil, and the CO2 is used to frack more oil. For them it needs to be net profit rather then net carbon negative. Protest and ridicule away.
Iceland has the most successful powered by geothermal and is over 90% net carbon negative already and likely to increase the longer it runs.
Other places inject the CO2 into concrete building blocks making them stronger and a viable non destructive form of storage.
Others turn them into burnable fuels effectively "recycling" the CO2.
Others use them for industrial production of urea, methanol, fire exstinguishers, or even for drink carbonation or food preservation. Scrubbing the air for CO2 instead of the traditional method of capturing off-gases.