Is the environmental impact of pesticide use on greenhouse crops substantially different from the impact of pesticide use in open-air crops?
I imagine that, at least in theory, a greenhouse should have the opportunity to keep pests out by being a closed environment. When pests are kept out in the first place, less or no pesticide should be needed to kill them. Or, if pesticide is being used, it may be less likely to escape into the natural environment.
Does my imagination have anything to do with reality?