Astroturfing is a political term describing a type of campaign or political demonstration that seeks to gain entry into popular culture using various channels of communication, deceitfully creating the illusion of a spontaneous movement. Where astroturfing events appear like a grassroots movements, "astroturf" is namely the artificial grass used in several football stadiums across the US.
Example of astroturf used in a sentence: The Astroturf Wall Street protesters were paid for by George Soros and the SEIU, and they had to be coached by professional organizers — including some people who didn’t speak English and couldn’t tell what the signs they were holding read.
American Corn Growers Association
This group opposes genetically-engineered crops for ideological reasons.
- ACGA has much stronger ties to and support from the environmental extremists than they do from actual corn producers in the U.S. They are not credible representatives for U.S. corn growers. 
The Union of Concerned Scientists (UCS) is a nonprofit alliance of some fifty thousand scientists and citizens across the United States. The group's stated goal is to combine rigorous scientific analysis with committed citizen advocacy in order to build a cleaner environment and a safer world. The group focuses on issues such as global warming and the environmental impact of vehicles and various energy sources.
Claims there is a "scientific consensus" in favor of the Anthropogenic global warming theory and trashed the reputation of Danish statistician Bjorn Lomborg when he exposed environmentalist junk science.
- UCS embraces an environmental agenda that often stands at odds with the “rigorous scientific analysis” it claims to employ. A radical green wolf in sheep’s clothing, UCS tries to distinguish itself from the Greenpeaces of the world by convincing the media that its recommendations reflect a consensus among the scientific community.