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11. Over the last 30 years, the rate of increase of CO2 at Mauna Loa has been ~1.5 ppm/year. If this rate continues, what will the level of CO2 be in 2030 (36 years from 2004) or 2050 (56 years from 2004)? In 2030 ______________ ppm in 2050 _____________ ppm