the addition of harmful substances into the environment

harmful substances that cause pollution

substances that are harmful even in small amounts

to collect old materials and process them into new again

things found in nature that humans can use

the saving of the Earth and its resources

trash that is disposed of incorrectly

a place where trash and waste are dumped

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Conservation

Term	Definition
pollution	the addition of harmful substances into the environment
pollutant	harmful substances that cause pollution
hazardous waste	substances that are harmful even in small amounts
recycle	to collect old materials and process them into new again
reuse	to use again
reduce	to use less of
natural resource	things found in nature that humans can use
biodegradable	breaks down easily
conservation	the saving of the Earth and its resources
litter	trash that is disposed of incorrectly
landfill	a place where trash and waste are dumped