Given the task definition and input, reply with output. In this task, you are given a summary for US Congressional and California state bill, your task is to generate a Title for this bill. The preferred titles are under forty words and mention the purpose of the bill.

Reducing Global Warming Pollution from Vehicles Act of 2008 - Amends the Clean Air Act to approve the application of the state of California for a waiver of federal preemption of its motor vehicle emission standards.
A bill to permit California and other States to effectively control greenhouse gas emissions from motor vehicles, and for other purposes.