The release of carbon dioxide into the atmosphere does more than affect the temperature of the planet. It’s also an important nutrient for plants. Produce growers have known for decades that hothouse crops do better at enhanced CO2 levels. But scientists are still trying to learn how plants will react to increased CO2 in the atmosphere. And as Minnesota Public Radio’s Mary Losure reports, their research could also shed new light on how the entire planet might respond to climate changes in the future.