[Assess students' ability to recall and identify the major greenhouse gases—carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), fluorinated gases, and water vapor—and match each to its primary anthropogenic and natural sources (e.g., fossil fuel combustion, deforestation, agriculture and livestock, landfills and wastewater, industrial processes, and evaporation). Scope: basic recognition and source attribution for Grade 9–12 introductory environmental studies.]