_:genid1 "Copyright protected. Obtain permission from the original figure source."^^ . "two-us-emissions-reduction-pathways" . "34.27"^^ . "Two U.S. Emissions-Reduction Pathways"^^ . "This graph shows how earlier action to reduce U.S. emissions would be less difficult than delayed action. Two pathways show how a cumulative carbon emissions budget of 265 gigatons of CO2 could be maintained by 2050. By initiating reduced emissions efforts in 2010 (blue line), a 4% per year reduction would have been required; waiting until 2020 to reduce emissions (red line) doubles the rate at which emissions must be reduced. (Figure source: Luers et al. 200724)"^^ . _:genid1 . . . . . . .