Environmental and human-rights groups here [USA] and in Peru have launched a last-ditch effort to delay final approval...of a controversial pipeline project in Peru they say endangers some of the world's most unique rainforests and Latin America's isolated indigenous populations...The 1.6-billion-dollar Camisea Gas Project...is being implemented by a consortium of private and state companies led by Argentina's Pluspetrol and Texas-based Hunt Oil. [also refers to Shell]