Title page 1

Contents 3

Summary 2

Introduction 4

EPA's 2009 Endangerment Finding 5

Process of Rulemaking 7

2009 Finding That GHGs Endanger Public Health and Welfare 8

2009 Finding That Motor Vehicle Emissions Cause and Contribute to GHG Air Pollution 10

EPA's Motor Vehicle GHG Regulations 11

EPA's Rescission of the 2009 Endangerment Finding 13

EPA's Regulatory Impact Analyses for GHG Regulations 14

Considerations for Congress 18

Author Information 20

Disclaimer 20

Table 1. EPA On-Road Motor Vehicle Greenhouse Gas (GHG) Regulations 12

Table 2. Estimated Regulatory Impact of Motor Vehicle Greenhouse Gas (GHG) Regulations 15