The gigatonne is a metric unit of mass or weight equal to one billion metric tons (tonnes) or about 2.2046 trillion pounds.
Note: 1 gigatonne = 1 billion metric tons. Annual emissions less than zero reflect the removal of greenhouse gases from the atmosphere. Based on national policies and pledges as of May 2021, prior to new pledges made at the UN summit on climate cha...
In the most stable atmospheric concentrations of greenhouse gases in 450750ppmvCO2 between scenarios, in one of the lowest cost mitigation options portfolio, CCS the economic potential of 23 cumulative total of 220200 gigatonne of CO2 (60600 Giga tons of carbon) this means that on average, a ...