Reasonable questions to ask. But a fairly well-known German study based on traps that catch flying insects had a 75% reduction over 27 years: [1] https://journ

Reasonable questions to ask. But a fairly well-known German study based on traps that catch flying insects had a 75% reduction over 27 years: [1] https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0185809 https://journals.plos.org/plosone/article?id=10.1371/journal... Just anecdotally, I see almost no bugs swarming street lights anymore, and have personally experienced the windshield phenomenon on several road trips.