APES Unit 7

most harmful pollutants named in Clean Air Act

SPLONC (sulfur dioxide, particulate matter, lead, ozone, nitrogen dioxide, carbon monoxide)

A student is setting up a model to study the carbon cycle and natural sources of carbon dioxide. They create a microenvironment that contains soil, leaf debris, an earthworm, heterotrophic bacteria, and a sun lamp. What natural source of carbon dioxide and major metabolic process was left out of the model?

There is no representation of photosynthesis in the model environment.

parts per million

measures CO2 concentrations in the atmosphere

VOCs sources

vehicles (largest source), evaporation of solvents or fossil fuels, aerosols, paint thinners, dry cleaning, trees (natural)

should be used to see geologic CO2 emissions

volcanoes