A&O SCI 2
Air Pollution
Lecture and discussion.
Spring 2026: 1 lecture and 9 discussions. 1 lecture and 3 discussions are open. The oldest of these readings was about 2 months ago.
Grades
3.86
Average grade awarded in A&O SCI 2. Not a student rating: this is what the grades were.
In the A range
91%
of the 2,329 letter grades
D, F or W
0.9%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
3%
92% of those passed
The registrar's own records: 2,329 grades over 12 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
3 of those terms are summer sessions, and summer sessions are counted here.
The table below splits them, and term averages across those 12 terms ran 3.60 to 3.97.
Historical grades for LI, QINBIN, across recorded terms. The course summary above includes all professors.
- A+ 1,249 · 55.5%
- A 644 · 28.6%
- A- 165 · 7.3%
- B+ 75 · 3.3%
- B 47 · 2.1%
- B- 17 · 0.8%
- C+ 16 · 0.7%
- C 16 · 0.7%
- C- 5 · 0.2%
- D+ 2 · 0.1%
- D 6 · 0.3%
- D- 2 · 0.1%
- F 7 · 0.3%
- P 72 of 2,330
- NP 6 of 2,330
- DR 1 of 2,330
Percentages are of the 2,251 letter grades. Grey bars are non-letter outcomes: passes (P), no-passes (NP), and withdrawals (DR).
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
Withdrawals are the exception to "excluded": DR is not scored, but it IS counted in the D, F or W figure above, which is reported over the letter grades plus the withdrawals. Pass/no pass and S/U outcomes are outside that figure on both sides.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Spring 2026 |
|---|---|---|---|---|---|---|---|
| LI, QINBIN reviews ↗ | 3.87 | 3.87 | 2,251 | 9 | 91% | very light | Open, 4 seats left |
| GONZALEZ, DAVID reviews ↗ | 3.76 | 3.73 | 78 | 3 | 90% | - | not teaching it |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Reported assignments across instructors and terms. This term's syllabus may differ.
What the work looks like
- 2 exams, 9 mentions in past reviews
- 5 quizzes, 8 mentions in past reviews
- 5 problem sets, 2 mentions in past reviews
- Labs mentioned, no number given, 3 mentions in past reviews
Based on 80 reviews; source checked about 2 months ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.
In Springs
Ran in 3 of the last 4 Springs.
From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.
From the registrar's catalog
Lecture, three hours; discussion, one hour. Causes and effects of high concentrations of pollution in atmosphere. Topics include nature and sources of gaseous and particulate pollutants, their transport, dispersion, modification, and removal, with emphasis on atmospheric processes on scales ranging from individual sources to global effects; interaction with biosphere and oceans; stratospheric pollution. P/NP or letter grading.
Sections in Spring 2026
Choose an open discussion to enroll; an open lecture alone does not mean a seat is available.
Seat counts as of : the oldest of these 10 readings. That term is over, so nothing has moved since.
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Seats
Open4 seats left in discussions.
Lecture: 286 of 296 enrolled
Instructor
Li, Q., Goldman, J., Nguyen, A., and Maneenoi, J.
3.87Predicted GPA
Historical records for LI, QINBIN; 2,251 letter gradesSeat risk
-9 discussions, 3 open: Dis 1B, T 10:00am-10:50am, Dis 1D, T 2:00pm-2:50pm, and Dis 1H, W 10:00am-10:50am.Every discussion, with its time and seats: 9 discussions
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Closed
33 of 33 enrolled
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Open
1 seat left.
31 of 32 enrolled
-
Closed
32 of 32 enrolled
-
Open
2 seats left.
30 of 32 enrolled
-
Closed
32 of 32 · 1 over enrolled
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Closed
32 of 32 enrolled
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Closed
32 of 32 enrolled
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Open
1 seat left.
31 of 32 enrolled
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Closed
32 of 32 enrolled
-
Final enrollment, averaged across each term's sections: between 87 and 271 a term over 9 terms, summer excluded, most recently 147 in Fall 2025. That is the shape across years, not this term, which is above.
From the people who took it
Student reviews
What taking A&O SCI 2 was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
No student reviews are available to read on dibs for this course yet. Took it? Tell the next person what helped, what was hard, and how you spent your time.
Looking for more perspectives?
External reviews are separate and do not count toward the dibs rating.
Seats over time in Spring 2026
How each lecture has filled since dibs first saw it.
A dot is a reading where something moved: the seat count, the status, or the waitlist.
What a flat run means, and where a line starts
Flat between dots means it did not drift, it held and then jumped, and a line starts when dibs first saw that lecture rather than reaching back before it existed. A lecture that has never moved draws a flat line across the whole window, and one with two or three readings draws a line joining them, which is too few to read a trend from.
Lec 1 · Li, Q., Goldman, J., Nguyen, A., and Maneenoi, J. · 286 of 296 enrolled
Unchanged over less than a minute
Both readings say 286 of 296.
How readings and alerts work
Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.
Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.
The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.