![The role of terrestrial plants in limiting atmospheric CO2 decline over the past 24 million years](/files/images/grassland.jpg)
The role of terrestrial plants in limiting atmospheric CO2 decline over the past 24 million years
Environmental conditions during the past 24 million years are thought to have been favourable for enhanced rates of atmospheric carbon dioxide drawdown by silicate chemical weathering. Proxy records indicate, however, that the Earth's atmospheric carbon dioxide concentrations did not fall below about 200