I think the environmentalists concern for grass and trees, and wildlife, comes from their college campuses. On any college campus, you usually see two kinds of trees: Little spindly trees held up by posts and wires, and grand majestic trees, whose drooping branches are propped up. The small trees never seem to thrive, even if the college has whole departments of professors dedicated to biology and agriculture. They are replaced every few years, much to the tax-funded profit of the landscaping companies that keep planting trees that mysteriously die.
This leads the students to believe that trees are scarce, fragile, and in danger. Next time dad drives them home for summer break, they should pull their heads out of their devices and look around. Trees cover the Earth in great abundance. They are ubiquitous, and robust. If an object fell out of the sky randomly, it would hit water most likely, but after that, a tree.