Ecology Expert Says A Real Christmas Tree is the Way To Go"It sounds a little counterintuitive because you hear us greenies tell you all the time, 'reusable this, reusable that,' " notes a Sierra Club editor.
Drexel University Biowall Becomes Showpiece For Eco-Building AdvocatesThe Delaware Valley Green Building Council is hoping that a recently completed project at Drexel University will spur interest in the construction of more "living walls."

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