51.   The biotechnology companies say that the food companies are caving in to pressure from environmental advocates who have written letters saying that consumers do not want these products.

52.   The case, which has been under negotiation and in litigation since early this year, is being watched by state officials and environmental advocates.

53.   The environmental advocates have been pressuring the federal government and some states to designate more land off limits to the bikers.

54.   The move was seen as a setback to environmental advocates and to state and federal programs designed to promote the sale of cleaner-burning cars.

55.   The second is the divide that separates mountain bikers from environmental advocates.

56.   The precipitous fall in key enforcement actions has alarmed EPA staffers and some environmental advocates.

57.   The same line divides the oil industry and environmental advocates.

58.   The transit and environmental advocates who flanked him at a news conference in Manhattan said he chose the best plan.

59.   They failed to pass the bill but won the hearts of many environmental advocates.

60.   To environmental advocates, it is also one of the easiest to control.