Pollution has always been around in small amounts. It was only after the Industrial Revolution of the 1800s that pollution became excessive and especially dangerous.
Man made water pollution has been around as long as people have. Natural water pollution has been around even longer, and it is when salt water flows into fresh water, animals die in water, or volcanic gases mix with water.
As long as there has been an ocean. Some pollution happens without the assistance of mankind. That includes volcanoes that erupt underwater, and oil deposits that leak out of the ground under or near water.
10000000000000000000000000000000000000000000000000000099 years
bum hole
hell yeh
how long has deforestation been around
As long as guns have been around.
since people started burning oil
how long has the london eye been around for
As long as So Random has been around.
234 years fool
how long have boxing been around?