What is pollution?, The use of natural resources, The presence of harmful substances in the environment, The process of recycling waste, The study of nature, What do we call substances that cause pollution?, Resources, Elements, Pollutants, Recyclables, Pollutants that can be broken down naturally are called:, Chemical pollutants, . Non-biodegradable pollutants, Primary pollutants, Biodegradable pollutants, Which classification of pollutants is produced directly from a source?, Particulate pollutant, Secondary pollutants, Natural pollutants, Primary pollutants, Carbon dioxide released from vehicles is an example of:, Natural pollutants, Air pollution, Thermal pollution, Noise pollution, Which category includes smoke, dust, and harmful gases?, Radioactive pollution, Soil pollution, Air pollution, Biological pollution, A naturally occurring substance becomes a pollutant when it:, Is used by living organisms, Exists in the environment, Exceeds the environment’s ability to neutralize its effects, . Is biodegradable, Why are secondary pollutants often more harmful than primary pollutants?, They are always visible, They remain harmless, They form through chemical reactions in the environment, They are biodegradable, Which situation best illustrates environmental pollution?, Rainwater seeping into the soil, Smoke reacting with sunlight to form smog, Trees absorbing carbon dioxide, Fish living in clean water, Which example correctly represents a primary pollutant?, Ozone formed in the atmosphere, Smog produced by sunlight reactions, Carbon monoxide released from vehicles, Acid rain

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