Answer:
One Word; Humans
Step-by-step explanation:
Literally everything we do causes pollution
Electricity generation
Cars
Houses
Plastics
Chemicals
Pesticides
Fossil Fuels
Using the wrong solutions - Electric cars cause massive amounts of pollution.
Solution:
For electricity use Nuclear Power plants
It sounds counterproductive, because it produces Nuclear waste, but one peanut sized piece of Uranium is the equivalent of 100,000 barrels of Oil. It can be safely disposed of too.
Organic Farming
DON'T GO VEGAN
Without life, there is no death,
and without death, there is no life.
Eating plants fertilised with blood meal is no different than eating a humanely raised cow, sheep, pig or chicken. Infact, the animals do not care about death because they understand that it is a fact of life. Just do it painlessly.
Sorry if this became a rant.