I've been day saying this for the past two years now, humanity is fucked, and soon.
The amount of CO2 in the atmosphere is a direct result from the energy we took from burning fossil fuels. To get all that CO2 out were going to have to wait Millenia for earth to do it (that is, if it still can) or spend that same amount of energy to get the CO2 out.
To put that into something understandable: we're going to have to spend ALL the energy we produced over the last two centuries on too of the energy we need for ourselves to be able to get CO2 back to preindustrial levels. Basically, for the next two to four centuries were going to have to spend at least 50% of our world energy budget to scrubbing CO2 and NONE of that energy is allowed to generate CO2. Actually, NOTHING from humanity can generate CO2 to reach that. If we continue spewing CO2 then you can double that number.
To put that into perspective, adding all required work and infrastructure, energy -all energy- will become 3-4 times as expensive for the next few centuries
People will not understand the issue and will not want to pay more, rich people will not want to foot the bill even though they could, so we won't do anything and things will get worse and worse until we all die.
One possible alternative might be spraying sulphuric acid into the atmosphere, that might buy us a few valuable years while we fix shit but what will happen is that we'll just spray the crap out of it and call that a solution while we continue to spray CO2 into the atmosphere like there literally is no tomorrow for humanity
We're fucked