One useful resource . . .
is Traci Gardner's List of Ten Critical Literacy and Technology Writing Activities (parts 1 and 2), which offers ideas for transforming relatively common writing exercises or assignments into activities that promote a sophisticated critical perspective on computer technologies as tools for writing and communication. Although Gardner's activities do not focus specifically on environmental concerns or the role of technology in our relationship with the physical world around us, her approach can easily be adapted to include such concerns and to promote a nondualist perspective.
I have also developed a variety of writing assignments and activities in my composition reader, Literacies and Technologies: A Reader for Contemporary Writers (2001), that are intended to foster the same kind of critical stance toward technology that Gardner's activities do. (Some alternative assignments can be viewed on the companion web site.) The assignments in this reader are grounded in the idea of a "reflective literacy" and focus on helping students understand the role of literacy and technology in their lives.