---
type: "Bill"
title: "Air pollution: research."
description: "Air pollution: research."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20072008"
identifier: "AB 2991"
citation: "California AB 2991 (20072008)"
classification: ["bill"]
subjects: ["Air pollution: research."]
status: "enacted"
primary_sponsors: ["Nunez"]
version_count: 5
action_count: 23
vote_count: 5
first_action: "2008-02-22"
last_action: "2008-09-30"
source: "openstates"
source_identifier: "ocd-bill/27b3cd8b-cffa-4fbc-aec8-dd3fadadfd9a"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200720080AB2991"
source_hash: "7c4e27ad5819fd8517b3681eb90330953cf7243c0b96518971cfcdaa900ab34c"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ca"]
---

# California AB 2991 (20072008) — Air pollution: research.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **02/22/08 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB2991&version=20070AB299199INT)
2. **04/09/08 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB2991&version=20070AB299198AMD)
3. **09/30/08 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB2991&version=20070AB299196CHP)
4. **AB2991** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200720080AB2991)
5. **09/10/08 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB2991&version=20070AB299197ENR)

## Votes

- Do pass as amended and be re-referred to the Committee on Appropriations. — **pass** (pass) · lower
- Do pass, but re-refer to the Committee on Appropriations. — **pass** (pass) · upper
- Assembly 3rd Reading AB2991 Nunez By Kehoe — **pass** (pass) · upper
- AB 2991 NUNEZ Assembly Third Reading By DE SAULNIER — **pass** (pass) · lower
- Do pass. — **pass** (pass) · lower

## Sponsors

- Nunez — primary (person)
- DeSaulnier — coauthor (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2008-02-22** Introduced. To print. `introduction`
- **2008-02-24** From printer. May be heard in committee March 25.
- **2008-02-25** Read first time. `reading-1`
- **2008-03-13** Referred to Standing Committee on Natural Resources. `referral-committee`
- **2008-04-08** From committee: Amend, do pass as amended, and re-refer to Standing Committee on Appropriations (Ayes 7. Noes 1.) (April 7). `amendment-introduction, committee-passage, amendment-passage, referral-committee`
- **2008-04-09** Read second time and amended. `reading-1, reading-2, amendment-passage`
- **2008-04-10** Re-referred to Standing Committee on Appropriations. `referral-committee`
- **2008-04-24** From committee: Do pass. (Ayes 12. Noes 5.) (April 23). `committee-passage, committee-passage-favorable`
- **2008-04-28** Read second time. To third reading. `reading-1, reading-2`
- **2008-05-08** Read third time, passed, and to Senate. (Ayes 53. Noes 19. Page 5031.) `passage, reading-1, reading-3`
- **2008-05-08** In Senate. Read first time. To Standing Committee on Rules for assignment. `reading-1`
- **2008-05-15** Referred to Standing Committee on Environmental Quality. `referral-committee`
- **2008-06-17** From committee: Do pass, and re-refer to Standing Committee on Appropriations Re-referred. (Ayes 5. Noes 2.) . `committee-passage, committee-passage-favorable, referral-committee`
- **2008-06-30** From committee: Be placed on second reading file pursuant to Senate Rule 28.8. `committee-passage`
- **2008-07-01** Read second time. To third reading. `reading-1, reading-2`
- **2008-07-10** To inactive file on motion of Senator Perata.
- **2008-08-19** From inactive file. To second reading.
- **2008-08-20** Read second time. To third reading. `reading-1, reading-2`
- **2008-08-21** Read third time, passed, and to Assembly. (Ayes 26. Noes 13. Page 5289.) `passage, reading-1, reading-3`
- **2008-08-30** In Assembly. To enrollment.
- **2008-09-18** Enrolled and to the Governor at 11 a.m.
- **2008-09-30** Approved by the Governor. `executive-signature`
- **2008-09-30** Chaptered by Secretary of State - Chapter 691, Statutes of 2008.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/27b3cd8b-cffa-4fbc-aec8-dd3fadadfd9a`. Confidence: reported (aggregated from official California legislature records).