Hallmann 2017 Krefeld 27-yr study: 75% decline in flying-insect biomass in German nature-reserves; Sanchez-Bayo 2019 review; pesticide + habitat-loss + climate drivers.
Hallmann 2017 Krefeld 27-yr study: 75% decline in flying-insect biomass in German nature-reserves; Sanchez-Bayo 2019 review; pesticide + habitat-loss + climate drivers.