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ens Page 3 of 11 4 7 to understand what we are getting into before we even switch to the new technology, " said Tracy Tromp , a CalTech research scientist and the study' s lead author. " It will not be like the case with the internal combustion engine , when we started learning the effects of carbon dioxide decades later . " Understanding the effects of hydrogen on the environment now should help in choosing the technologies that will be the basis of a hydrogen economy . " If hydrogen emissions present an environmental hazard, then recognizing that hazard now can help guide investments in technologies to favor designs that minimize leakage , Tromp said . " On the other hand, " she said, " if hydrogen is shown to be environmentally friendly in every respect , then designers could pursue the most cost effective technologies and potentially save billions in needless safeguards . " Forest Service To Study Impacts of Thinning Project WASHINGTON, DC , June 13 , 2003 (ENS) - The U . S . Forest Service will prepare an environmental impact statement to study the impacts of a forest thinning project and watershed improvement activities within the Red Pines project area in northern Idaho ' s Red River watershed . The 31 , 466 acre Red Pines project area is located on the Nez Perce National Forest . The agency plans to reduce existing and potential fuel loads by thinning and/or salvaging and underburning on approximately 4 , 760 acres while improving aquatic conditions in the area' s subwatersheds . About 25 miles of temporary road would be constructed to access the areas . Some 18 miles of existing roads would be reconditioned prior to use , and 40 to 45 miles of existing roads that do not improve access to the area for public recreation or administrative use would be decommissioned . http $ Hens -news . com/ens/jun2003 /2003 - 06 - 13 - 09 . asp 06/ 16/2003