Most studies I read about the decline in insect population in Europe compared to a baseline from around 30 years ago. Here is one source (written in English) ab

Most studies I read about the decline in insect population in Europe compared to a baseline from around 30 years ago. Here is one source (written in English) about areas in Germany: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0185809 https://journals.plos.org/plosone/article?id=10.1371/journal...