Scientists know that some methods used to increase food supply are dangerous to humans. which method is known to be harmful to human health?

A pesticide is a substance used to kill feral animals, insects, fungi or plants. There are thousands of different pesticides in use today. Pesticides are used in houses, shops, offices, sheds, gardens, farms, gas stations and other places.  Most of the pesticides used today are chemicals which have been developed in a laboratory by scientists and produced in factories. Some pesticides are very hazardous, they can be harmful to humans and other living things.  They can contaminate land, the air, food crops, water ways and seriously harm or kill native animals, pets and domestic animals. To the user, pesticides can also cause great harm and sometimes death to a person or other living things nearby.

Pesticides come in three different forms:

solids, which come in powder form (like flour), or in crystal or granular form (like sugar)

liquids, which look like milky water

aerosols, which are sprayed out in a fine mist

Hope this helps, sorry if not tho

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus