Assume that the rate of carbon emission at 10 Gt/year increases at a constant rate to a maximum of 20 Gt/year in 2050, and then decreases at the same rate. Assume that ocean and land biomass together absorb excess CO₂ at a constant rate of −5 Gt/year.In what year will atmospheric CO₂ levels peak? What will be the level of atmospheric CO₂ in that year? and Repeat the analysis under the more optimistic assumption that ocean and land biomass together absorb 2.5%of the excess in atmospheric carbon above 600 Gt each year, assuming for simplicity that atmospheric carbon is 800 Gt in 2010.