Science Now: Plants are one of the last bulwarks against climate change. They feed on carbon dioxide, growing faster and absorbing more of the greenhouse gas as humans produce it. But a new study finds that limited nutrients may keep plants from growing as fast as scientists thought, leading to more global warming than some climate models had predicted by 2100.
Plants need different nutrients to thrive, such as nitrogen for making the light-absorbing pigment chlorophyll and phosphorus for building proteins....