Growing trees need three essentials – radiant energy from the sun, CO2 and rain from the atmosphere, including nutrients and minerals from the soil. Climate alarmists correctly claim that burning forest products in thermal power stations is "net-zero emissions" because burning the wood just puts the same CO2 back into the atmosphere.
Identical reasoning applies to grazing cattle.
Grasses have the same needs as growing trees: sunlight, CO2, water, and soil nutrients. Cattle eat pastures to build proteins, fats and bones. If meat and milk from cattle is consumed by humans, some of the carbon is quickly returned to the atmosphere via emissions from cattle and humans (from both ends). The rest is sequestered for a longish time in human bodies, bones and cemeteries but eventually returns to the atmosphere.
