To find out how much CO2 mature trees can absorb, 4 years ago Norby and colleagues built towers to pump carbon dioxide into the canopies of four stands of young sweetgum trees. (sciencemag.org)
Today, the hard working volunteers and staff of Delaware Wild Lands are focused on converting the current forests of sweetgum and red maple back to the historic condition of cedar and cypress. (treehugger.com)
As Norby reported here 9 August at the annual meeting of the Ecological Society of America, most of the extra carbon went into wood in 1998, the first year the towers were turned on, with the gassed - up sweetgums accumulating 35 % more carbon than trees in a control plot. (sciencemag.org)