Some things they do is litter, and throw things in their that isn't you really have to be more specific when you ask questions...not to be mean or anything
The real question is "How Can It Not Harm People"
No they dont harm people
fat people
because it's easy to trade with people
so that they have enough supply of water
because the bloody are
no but hey can harm some animals
It is sort of Impossible to know as people who self harm mostly keep it a secret and people are constantly starting to self-harm and people ard stopping so it is hard to know but about 3 people self harm each hour in the UK and about 3,000,000 Americans self-harm that is a rough estimation for you.
Coasts Can be found at the seaside, Coasts are where the land (sand) and the sea(water) meet together.
Coasts are formed by land and sea
Plastic bags, plastic bottles, soda cans...coasts are being polluted with items that people leave behind and the wildlife consumes that causes it to become unhealthy.
some ways are fish farmin, ports , Importing and Exporting