Rising carbon dioxide (CO2) emissions will create a greener world and prevent the worst parts of global warming, according to a new scientific study. Researchers from the Oak Ridge National Laboratory and the University of California, Irvine found plants use water more efficiently when exposed to higher concentrations of CO2, meaning any droughts caused by global warming would be much less severe than previous estimates. “This is something that everybody who has studied plant physiology and CO2 has known for decades” Dr. Pat Michaels, director of the Center for the Study of Science at the libertarian Cato Institute who was not involved with the study, told The Daily Caller News Foundation. “Millions of years ago plants there was a lot more CO2 on Earth than there is today,” he said. “Plants grown in high CO2 levels change their optimal temperature for conducting photosynthesis, they’re pre-adapted to a much warmer world with much more CO2 in the air.”