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Do Hybrid Construction Machines Pollute More?
2013-10-21 22:11:13| ENR.com: Headline News
UCR's two-year study evaluated a hybrid Caterpillar dozer and Komatsu hydraulic excavator in various field trials.
Tags: more
construction
machines
hybrid
Texas: African dust, Mexican fires pollute Houston
2013-09-22 17:33:50| Waste Management - Topix.net
The Texas Commission on Environmental Quality has told the U.S. Environmental Protection Agency of its findings.
Tags: texas
african
houston
mexican