There is only one goddess Gaia and Al Gore is her only prophet...

[Zenda]

or the detritus of dead organisms that might accumulate on the ocean floor

There is no such accumulation. Everything gets eaten, and is eventually swept back up to the surface as krill and other animals, to serve as food for whales and small fish (which get eaten in turn).

The only way to really lower CO2 levels is to take lots of it *out* of natural cycles. Having it temporary in some invisible part of a cycle doesn't help. It took extreme circumstances (providing rapid enclosure of vegetable material, before it had the chance to rot, on a very large scale) to produce coal and oil. This took away CO2, and allowed for other natural circumstances. At the moment, we are almost finished bringing those deposits back into our environment, recreating the 'comfortable' warm earth from long ago. And we did it in a few years, not millions. Aren't we good?