News Items in This Edition:
-Household sewage: Not waste, but a vast new energy resource
-New method for making large quantities of deuterium-depleted drinking water
-How studded winter tires may damage public health, as well as pavement
-Organic onions, carrots, and potatoes do not have higher levels of healthful antioxidants
-Smart grid would save energy, cut costs for U.S. consumers
