it’s usually taken to be the fact that as carbon dioxide concentrations in the atmosphere increase, the 1 per cent of co2 that’s the heavier carbon isotope ratio c13 declines in proportion.
it’s usually taken to be the fact that as carbon dioxide concentrations in the atmosphere increase, the 1 per cent of co2 that’s the heavier carbon isotope ratio c13 declines in proportion.
carbon dioxide:192
increases in atmospheric concentrations of co 2 and other long-lived greenhouse gases such as methane, nitrous oxide and ozone have correspondingly strengthened their absorption and emission of infrared radiation, causing the rise in average global temperature since the mid-20th century.