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Any lost methane is significantly worse than the equivalent amount of CO2. Even though it's carbon neutral, the intermediate step converts it to a much more po
by hwillis 10y ago
Any lost methane is significantly worse than the equivalent amount of CO2. Even though it's carbon neutral, the intermediate step converts it to a much more potent greenhouse gas that is very easy to lose to atmosphere. Without a digester, the biomass will be converted to co2 instead. Energy that could have been stored as methane is converted to heat. The best case scenario is to skip biology entirely and throw it into the incinerator, where it can be used to produce heat for power and almost only co2, skipping over methane entirely.
Done right, a digester extracts a little bit more chemical energy from biomass that simply leaving it on the ground. Done wrong it weaponizes the carbon.
- fastbeef 10y agoBut when in the form of methane it can be used as fuel on the farm which means that the equivalent amount of fossil fuels don't need to be consumed.
- andygates 10y ago"Any lost methane is significantly worse than the equivalent amount of CO2." ...except that methane doesn't persist anything like as long as CO2, so while it's mean and pointy upfront, it's out of the environment faster. This is pretty basic climate science that routinely gets misrepresented by the denier industry, which is why I'm bothering to pick this nit.