Using carbon dioxide from the atmosphere, as well as sunlight and water, hybrid poplar trees grow fast and tall, up to 12 feet per year. They also harbor a considerable amount of carbon in their stems ...

DULUTH — It’s been said that the true meaning of life is planting a tree "under whose shade you do not expect to sit," a hint, of course, that you’ll likely be dead before the tree gets that tall. But ...

SEBEKA, Minn. -- While researchers rush to develop new biomass sources for cellulosic ethnanol, Minnesota for a decade has been working on short-rotation, intensive of culture trees for energy and ...