What are the current technologies that are available to reverse Global Warming? I have read about a lot of carbon removal technologies but are they feasible now, or will they ever be ?
•Plant and bury. Grow plantlife where it hasn't been growing before (oceans are one example, but tundras and deserts can also be used), and bury or otherwise control the output.
•Weathering. The planet already has a system for removing CO2 from the air, it's just slow. Olivine rocks, along with limestone, trona, and pretty much anything with carbonates capable of becoming bicarbonates, will absorb CO2.
•Injection. Assuming you can get CO2 in pure concentrated form, just need to pump it down to briny deposits that will absorb it. The bad news is almost nobody burning fossil fuels makes CO2 in pure concentrated form. The leading use of injected CO2 a) mines it already in concentrated form and b) uses it like fracking to push out more oil and gas, making its efficacy questionable.
Instead, reducing energy usage and replacing fossil energy with cleaner forms yields much more CO2 reductions per dollar.
The oceans are absorbing CO2 as we speak. The less we emit, the more they can absorb. They are warming and their ability to absorb will lessen.
Think about the derivatives. We are building new coal plants. Yearly emissions are increasing.
First stop building new coal plants. Then start shutting old ones down. When no coal plant is running, then do carbon capture.