Thanks for the replies. Want to propose something here and see what you think. Let's say that I to prove beyond a shadow of a doubt that certain chemicals are harming the planet. I can disseminate this information and hope that people will accept it, and hope that they stop using the chemicals.
Suppose that I also know that these chemicals have a detrimental effect on humans, but the proof is not as conclusive. My agenda is to stop the chemicals from destroying the planet, but I approach the subject by writing a book, about how these chemicals affect people's health (and ignore the effect on the planet, although the two may be linked in some way). Many people stop using the chemicals to improve their health as a result of the book, but my real agenda was to stop them from using the chemicals to help the planet.
By being manipulative, I have achieved a goal that ultimately will be good for the planet AND the vast majority of the people. However, it may not be good for the chemical companies that sell these products, and the few that work there and the shareholders who profit at the expense of others.