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Just in case you needed another reason to cut back on your gasoline consumption, you might consider the pollution catastrophe we are creating in Canada, America's main oil supplier. A new report (PDF) released by Environmental Defense, using industry figures, estimates that tailings ponds created by oil sands projects may be leaking 2,750,000 gallons of contaminated water every day. While that sounds like a lot, the problem may actually be even worse considering the conservative methodology used

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Environmental Defense has launched a report about how automakers are improving to reduce emission levels. The highlights of the report state that, although individually almost all models reduced emissions in the last three years, the overall contribution to global warming has continued to grow since 1990. That is, although cars pollute 3 percent less than in 2004, the net increase in emissions is 1.5 percent since 1990.

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If only we could put everything on a linear scale, it would be so much easier to see if one thing is better or worse than another. Yahoo! teamed up with Environmental Defense to do just that for the "greenness" of automobiles. It's a similar concept to J.D. Power and Associates' Automotive Environmental Index, however, Yahoo! and Environmental Defense chose to use a 0 to 100 point system in which the higher the rating, the greener the car and they're posting it on Yahoo's automotive website buil

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