Ken Cook is president and co-founder of the Environmental Working Group.http://wcfcourier.com/news/local/speaker-pushes-healthy-livi...Speaker pushes healthy living at UNI<snip>Iowa's desert-like landscape is part of the problem with modern agriculture, according to one of the nation's most influential environmentalists.(at a)...celebration of the 40th anniversary of the Clean Water Act and the 50th anniversary of Rachel Carson's book "Silent Spring." ....Cook said what's happening to the land is not necessarily the fault of farmers. He pointed to the industry as a whole and government farm policies that promote maximum production over the environment. That, in turn, has contributed to water quality, public health and obesity problems, along with other issues Americans face today.