I don't know if I count as an environmentalist or gay rights activist, but I certainly believe in protecting the environment and treating everyone fairly.

My notion of treating everyone fairly does start with an axiom that comes from an emotion, but I proceed logically without emotion from that axiom.

My idea of environmentalism is not even founded on emotion. We can calculate the cost of a certain type of pollution by looking at rent prices in areas that are similar except for the the level of pollution. We can calculate the cost of medicine to treat problems shown to be caused by pollution. We can look at the costs of keeping the water out of low-lying urban areas like New Orleans or Rotterdam and project how much sea level changes would cost other coastal areas. We can look at those future cost estimates, and use the time value of money equation to work out the present value cost of emission. Then we tax people that cost, instead of taxing an activity we want such as working. If emitting that pollutant creates a product that creates billions of dollars of value, they can still do it and pay the tax. Otherwise they need to find ways to reduce emissions to avoid pushing their costs on other people in acts of unintentional vandalism.