Complex sentence: NEPI sought environmental policy changes in the 1990s towards greater involvement of states and localities in national policy making to engage a greater grassroots involvement and move some of the decision-making out of a politicized Washington DC and provide more fact and science-based decision making.
Split into simpler sentences: NEPI sought environmental policy changes in the 1990s towards greater involvement of states and localities in national policy making. Ritter engaged a greater grassroots involvement to move some of the decision-making out of a politicized Washington DC and provide more fact and science-based decision making.