August 28, 2008 - 11:50am
from NY Times
The thousands of recently planted green and purple shrublike sedum lining the roof of Con Edison’s training center in Long Island City look a bit out of place in the shadow of Manhattan’s skyline. But the tiny absorbent leaves and modest but hardy roots of the sedum — typically found in desert climates — are at the center of a growing effort to reduce greenhouse gases, rainwater runoff and electricity demand in New York.