background

bad

beach

bottle

chemical

city

cleanup

coast

conservation

contamination

damage

danger

dirt

dirty

disposal

dump

ecological

ecology

ecosystem

environment

environmental

floating

garbage

human

industrial

industry

junk

lake

nature

ocean

plastic

pollute

polluted

pollution

pond

problem

recycle

recycling

river

rubbish

scrap

sewage

smell

toxic

trash

underwater

unhygienic

urban

waste

water