Biology 1001A and 1002B, or the former Biology 1222 or 1223; Chemistry 1100A/B and 1200B, or the former Chemistry 1020, 1050, or 023;
0.5 course from: Environmental Science 1021F/G, or a 1000-level half course in Geography, or Earth Sciences 1022A/B, 1023A/B, 1081A/B, or Physics 1028A/B, 1029A/B, 1301A/B, 1302A/B, 1401A/B, 1402A/B, 1501A/B, 1502A/B, or the former Physics 1020, 1024 or 1026;
1.0 course from: Applied Mathematics 1201A/B, Calculus 1000A/B, 1100A/B, 1301A/B, 1501A/B, Mathematics 1225A/B, 1228A/B, 1229A/B, 1600A/B, Statistical Sciences 1024A/B, or the former Calculus 1201A/B, Linear Algebra 1600A/B or Mathematics 030.

Module
9.0 courses:

0.5 course: Biology 2483A or Biology 2485B.
0.5 course: Chemistry 2210A/B.
1.0 course: Environmental Science 3300F/G, 3350F/G.
0.5 course from: Biology 2244A/B, Statistical Sciences 2141A/B, 2143A/B, the former 2122A/B, Psychology 2810 (Module will be 9.5 courses if Psychology 2810 is taken).
0.5 course: Geography 2220A/B (strongly recommended) or a Geography half-course from the Environmental Science Course List.
0.5 course at the 2000-level from Earth Sciences courses in the Environmental Physical Sciences Subject Courses List.
1.5 course: Environmental Science 4999E.
0.5 course from: Environmental Science 4949F/G, Biology 4230A/B, 4243G, 4405F/G, 4932F/G, Earth Sciences 4431A/B.
2.5 additional courses from the Environmental Science Course List, including at least 0.5 course from each of the 3 subject areas.
1.0 additional course at the 3000 level or above from the Environmental Science Course List.

Note: Students should plan the modules taking into account prerequisites of senior courses.