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You are looking at Spring 2026. That term is over, so these are last term's numbers rather than seats you can take. dibs holds 21 sections for Spring 2026, read 8 days ago. Separately, it has finished 15 of the 3,494 courses on its current checking list for this term. Future-term coverage is incomplete, so a course with nothing here may simply not have been reached yet. Back to Fall 2026

A&O SCI 2

Air Pollution

4 units Physical Sciences

Sections & times

Lecture and discussion.

Spring 2026: 1 lecture and 9 discussions. 1 lecture and 3 discussions are open. The oldest of these readings was 8 days 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.

  • A+ 1,294 · 55.6%
  • A 661 · 28.4%
  • A- 173 · 7.4%
  • B+ 77 · 3.3%
  • B 48 · 2.1%
  • B- 17 · 0.7%
  • C+ 16 · 0.7%
  • C 18 · 0.8%
  • C- 5 · 0.2%
  • D+ 2 · 0.1%
  • D 6 · 0.3%
  • D- 2 · 0.1%
  • F 10 · 0.4%
  • P 76 of 2,413
  • NP 7 of 2,413
  • DR 1 of 2,413

Percentages are of the 2,329 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

Predicted GPA, raw average, sample size, terms, A range and the workload reviewers reported for every instructor with a grade record in this course
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.

Reviews for A&O SCI 2

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

You enroll in the discussion, not the lecture, so a discussion's status is the one that decides whether you get in. A lecture can read open while every discussion under it is full.

Seat counts as of : the oldest of these 10 readings. That term is over, so nothing has moved since.

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.

Write a review

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.

Read reviews on BruinWalk

Community guidelines

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

286 of 296 · 4 left in its discussions

Both readings say 286 of 296.

5 Sep 03:055 Sep 03:05
1 hour plotted. dibs read it.286 of 296 enrolled at the newest reading, 8 days ago, with 4 left in its discussions. Seats from 5 Sep 03:05 to 5 Sep 03:05, 286 to 286. The line is flat across the whole window: recorded enrollment counts match. Changes between reads may be missed. Every hour plotted carries a read, so a count that did not move here was checked and did not move.
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

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.