Curated OER
Identifying the Relationship Between Black Carbon and the Weather
Students identify the relationship between black carbon and the weather. In this investigative lesson students compare samples of black carbon with a color-scale and analyze others samples.
Encyclopedia of Earth
Encyclopedia of Earth: Physics & Chemistry: Carbon Dioxide
Explains what carbon dioxide is, where it is found, sources of it, and describes human activities that contribute to carbon depletion and increased levels of carbon dioxide in the atmosphere. (Updated: February 22, 2013)