Assess students' ability to recall the major greenhouse gases—including carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), fluorinated gases (e.g., HFCs, PFCs, SF6), and tropospheric ozone—state their chemical formulas and identify the primary anthropogenic sources for each (e.g., fossil fuel combustion, agriculture, industrial processes, refrigeration, and waste); scope limited to names, formulas, and dominant human-driven sources only.