Well insecticides and habitat loss kill insects. Intensive farming involves insecticides and habitat loss. And fertilisers in runoff may damage ecosystems causing further loss of habitat.
Urea based fertilizers could be harmful to insect life (e.g. it's the active ingredient in "SB Plant Invigorator"). It's also worth noting that the fertilization for mono-crops is detrimental to diverse plant ecologies - native orchid species in the UK have been decimated due to fertilizer run off from agriculture - lots of other species native to low nutrient chalk downland are also effected. The knock on is dramatic decreases in insect populations and diversity, butterflies have been hit especially hard.
Fertilizers are chemicals. Just because it helps plants grow doesn’t mean it’s not toxic to other living beings, including humans. Imagine you being an insect just chilling and suddenly you’re covered in urea. You’ll die instantly.
Isn't suddenly being covered in urea a long established hazard of the trade for many insects?
I'm guessing bees and other insects have been plying their trade for much longer than humans have been functioning.
I wasn't referring to human urea particularly.
That's not what I meant at all, and I think you know that
I know what you meant, I was just helping you understand what I meant.
Water is a chemical. Just because it helps humans grow doesn't mean it can't be toxic to other living beings, including humans.
That appears to be true for humans, if you don't take enough electrolytes at the same time:
Jeez, what a constructive comment. I wish everybody in the world spoke like you do, what a beautiful world it would be
Most people mean synthetic chemicals when they talk about chemicals. Organisms have adapted to naturally occurring chemicals and their concentrations, which makes them usually less toxic to them.
Fertilizer is primarily composed of nitrogen, phosphorus and iron. You can also buy organic fertilizer and it's a very natural thing...
Maybe you are thinking of herbacides or pesticides?