acid

analysis

atmosphere

catastrophe

contamination

danger

dangerous

deathly

dirty

disposal

dump

dumping

earth

eco

ecology

environment

examination

garbage

global

hand

harmful

hazard

heavy

impact

irritant

junk

landfill

liquid

littering

mess

nature

planet

plastic

pollution

pouring

problem

recycling

responsibility

rubbish

save

scientist

scrap

sign

social

substance

symbol

toxic

trash

tube

waste