The three environmental problems caused by human are:

1) Human activity like the building of industry, like sugar mill, chemical industry, emitted certain harmful effluent that pollutes air and water and soil as well. Improper waste management leads to persistence of non-biodegradable products in the environment which causes health issues to animals and plants.

2) Deforestation- cutting of trees led to the migration of certain animals and cause the extinction of the species. It also results in floods and droughts. The primitive agricultural practice caused soil erosion.

3) The burning of fossil fuels leads to the depletion of ozone layer and may cause several health problems.