Climate change is spurring the hemlock wooly adelgid, an invasive insect, to move further north, and it’s bringing down many hemlock trees.
Organic foods are becoming more popular every year in the US. But when it comes to basic commodity grains like corn and soy, American farmers have been slow to go organic, so imports are meeting the demand.
Plants are responding to rising levels of carbon dioxide by performing more photosynthesis and using water more efficiently.