As the economic collapse due to environmental regulations continues there will be less money available to fund environmentalists. Every time you meet someone recently put out of work, point out that it is environmental regulations that cost them their job. They might not get the connection right away, but since they are out of work, they will have time to listen to your explanation and perhaps a light will go on for them.
It hasn't happened yet. Once they have been thoroughly proven wrong, usually after a ton of regualtions have been passed and class action lawsuits won, they move on to their next looney theory and the cycle starts all over again. There is a sucker born every minute with no end in sight.