[palmer]

If not all the energy consumed by the ingestion of food is burned, we gain weight. A human that has a static weight is carbon neutral

Both statements are incorrect, feces and urine have varying amounts of carbon and calories and our digestion determines whether or not we gain weight more than how much we exercise (yours is a common misconception). Carbon neutrality is quite impossible in any case, since we create carbon when we activate muscles, keep warm, etc.

[palmer]

Sorry, I shouldn’t say “create” carbon, we create CO2.

[cmwy]

just as humans burn carbon for energy(= carbon neutrality)i believe coal is carbon eg coalfired electric is carbon neutral. what science backs that up?

[cogitator]

Carbon neutrality is quite impossible in any case, since we create carbon when we activate muscles, keep warm, etc.

Human beings are not primary producers (not even greenies).

[lepton]

since we create carbon when we activate muscles, keep warm, etc.

Impressive fission/fusion powered muscles. :)