[D Rider]

Malarkey. With the exception of burning fossil fuels, none of these add to the amount of CO2 in the biosphere in a significant way. They just move it around within the biosphere.

Of course that excepts "fossil fuels," which are nothing more than solar energy that has been stored in lifes battery, the hydrocarbon. Returning the carbon to the atmosphere as CO2 should not be considered a bad thing.

[Sherman Logan]

I’m not saying that it is bad. Certainly at some point an increase in CO2 would indeed be a bad thing, though I suspect we are far below that point now.

But the paragraph I cited was indeed malarkey. Nothing he mentions increases CO2 net, except fossil fuel burning. As you say, this merely returns previously stored C to the atmosphere, but it does indeed raise CO2. The others do not. Lumping them together is either an ignorant mistake or an intentional attempt to deceive the reader.