rex, that's true for any carbon based fuel - as long as we're burning carbon (to heat water, to generate steam, to spin turbines, to spin generators, to make electricity) that's gonna be an issue - whether it's coal, or fracked natural gas, or oil, or biomass
Agreed in part. Any time you burn hydrocarbons, you inherently are generating CO2, and therefore any burning of any hydrocarbon is harmful to some extent. However, there are a few caveats and exceptions.
- If there is a full-cycle with atmospheric carbon dioxide, you could potentially reduce the net impact. So, biomass burning could be cleaner if the carbon in the biomass is significantly taken in the first place from the atmosphere.
- The type of carbon matters. Methane, CH4, is one carbon with four hydrogen bonds, making it the simplest possible organic molecule. When you burn it, you get one molecule of carbon dioxide and two molecules of water vapor, and you release the energy of four bonds. Gasoline and oil and coal are mostly longer-chained organic molecules. So, while you get a lot of energy from the various types of carbon-carbon bonds, a larger proportion of your energy is coming from releasing carbon dioxide. Therefore, while it's true that there's no such thing as clean natural gas, it can still be cleaner relative to using coal and oil.
ideally, the best form to put it into would be one that had demand - can you imagine re-engineering the world of plastics manufacture to make it economically viable with CO2 as the primary feedstock? :think:
Sounds expensive. How would you generate the energy to do that?
and as far as calcium carbonate goes, you're talking about cement and gravel, both of which have demand
but where are you planning to source the calcium from?
No idea.