"Greenism" is when people harp on stewardship but justify abortion, forced sterilization, totalitarian government, and State control of religion, because those things are all "good for the planet". Stewardship does not put the planet or "green" causes above mankind nor does it worship the earth. I'm sure you can find what the Holy Father said on the subject with a little work. He spelled out the difference between stewardship and the green agenda pretty well not all that long ago.
I was a Vietnam vet attending college on the GI Bill in 1970 when the first day was held. As I recall this first Earth Day, it was a bunch of hippies (creeps) hanging out on the Common, holding communist signs, smoking dope and tossing Frisbees. Now, over forty years later, these same people hold high positions in the Obama administration. And, now it's forty years later and I bet their Frisbee skills still suck...
What ever happened to charity as Jesus taught? He gave all of us an individual mandate to practice charity and love for our fellow man, not government sponsored social justice wealth redistribution. When Obama was campaigning and just before the housing market crash, I remember one of my coworkers saying that everyone had a “right” to a house. I thought he was crazy. We waited to buy our house until we could afford it. We didn't expect the government to give us one.
I've noticed that when the government takes over our social programs, individual acts of charity go down. How many old folks now live in nursing residences with government subsidies. Families do not feel responsible for the grandparents anymore. Why should we, the government will provide.
Greenism is believing in the silly science of global warming. I have read enough on this subject to realize that there is little real science, but a lot of politics. When scientist disagree with global warming, they are threatened with their jobs. Global warming is used as a way to control our behavior, from flushing our toilets, to what type of lights we can use and what type of house and car we can buy. Eventually, they will be forcing us to sell our homes if they do not meet the government standards for square feet per person. I do not believe Jesus meant government control when he talked about charity.
Greenish is like a treehugger. They have never moved on from knowing God The Father in all His creation. They see God in a tree. They have not known His Son Jesus Crucified for our sins...that would mean admitting there is sin and amending our lives and realizing that Jesus did die for our sins and opened the gates of heaven for us. But for these religious...bishops, priests, sisters...it’s dangerous. More so than for your lay person or for someone who does not truely know God.