gases substances
solid
The unwanted presence of materials containing radioactive atoms on other materials.
The Environmental Protection Agency (EPA) is primarily responsible for protecting the environment from contamination by hazardous materials.
Ensure to rinse materials to prevent any contamination.
to prevent cross contamination
No because the primary industry do the crops and the secondary industry use the crops to make materials and if there's no crops how would the secondary industry make the materials
pollution is the contamination of air, water or soil materials interferes with human health.
4
occupation that involves manufacturing of finished products from raw materials are called secondary occupations
secondary production is the conversion of raw materials to finished products. this is the second stage of production.
secondary production is the conversion of raw materials to finished products. this is the second stage of production.
The federal agency primarily responsible for protecting your environment from contamination by hazardous materials releases is the Environmental Protection Agency (EPA).
The Primary Industry. Secondary Industry PREPARES raw materials though.