Recycling at Festivals and Public Events
The Effects of an Ambiguous, Negative Sign Prompts and a Clearly-Stated Positive Sign Prompt on Intentions to Litter
Horsley, A. D. (1988). The unintended effects of a posted sign on littering attitudes and stated intentions. Journal of Environmental Education, 19, 3, 10-14.
Waste Wise Program
The Effects of an Ambiguous, Negative Sign Prompt and a Clearly-Stated Positive Sign Prompt on Intentions to Litter
Horsley, A. D. (1988). The unintended effects of a posted sign on littering attitudes and stated intentions. Journal of Environmental Education, 19, 3, 10-14.
Washington State Promotes the Purchase of Recycled Content Products With Prompts in the "Get in the Loop, Buy Recycled" Program
King County commission for Marketing Recyclable Materials & Atwood, A. M. (1994). Consumer research survey: Knowledge, attitudes, and purchase of recycled-content products. King County Commission for Marketing Recyclable Materials.
Energy and Water Reduction: "Green" Hotels
Clean Builder Program
The Effects of Sign Prompts and Large Receptacles on Highway Littering in Richmond, Virginia
Finnie, W. C. (1973). Field experiments in litter control. Environment and Behavior, 5, 2, 123-144.