Related by context. Frequent words. (Click for all words.) 66 regulate carbon dioxide 62 regulate greenhouse gases 56 regulate greenhouse gas 55 regulate tailpipe emissions 54 greenhouse gases endanger 49 sulfur dioxide nitrogen oxides 49 smokestack emissions 49 regulate 49 regulating greenhouse gases 48 tailpipe standards 47 heat trapping 46 Environmental Protection Agency 46 EPA 46 regulating greenhouse gas 46 pollutant 45 promulgate regulations 45 Nitrogen oxides 45 smog forming nitrogen oxides 45 judge Priscilla Owen 45 Response Compensation 44 tailpipe emissions 44 prescribe lethal 44 Burning fossil fuels 43 reduce smog forming 43 regulate interstate commerce 43 smog forming 43 hears oral arguments 43 sulfur dioxide SO2 43 heat trapping carbon dioxide 43 heat trapping gases 43 ban judicial filibusters 43 Constitution Commerce Clause 42 emit greenhouse gases 42 regulating 42 greenhouse gases 42 emit CO2 42 Clean Air 42 remove gray wolves 42 By Julian Pecquet 42 spokesman Dale Kemery 42 indefinitely detain 42 impose punitive 42 sulfur dioxide nitrogen oxide 42 mercury emissions 42 delist wolves 42 v. Raich 42 gases 42 heat trapping greenhouse gas 42 fleetwide average 42 Chairwoman Barbara Boxer 42 reduce greenhouse gas 41 warming gases 41 Low Level Radioactive 41 overturn 41 Russ Feingold D Wis 41 enact 41 impose stricter 41 toxic pollutants 41 sulfur hexafluoride 40 greenhouse gas 40 unelected judges 40 endangered species protections 40 overrule 40 greenhouse gases GHGs 40 heat trapping gasses 40 overturn Roe vs. 40 emission 40 Toxic Release Inventory 40 rulemaking 40 Toxics Release Inventory 40 Charles T. Drevna 40 spokesman Jonathan Shradar 40 Natural Gas Regulatory 40 Clean Water Act 40 interstate commerce clause 40 Neil Carman 40 conduct roving wiretaps 40 inhaling toxic 40 acted arbitrarily 40 Judge Gladys Kessler 40 heat trapping emissions 40 Kyoto Protocols 39 carbon dioxide 39 toxic pollutant 39 suspected carcinogen 39 burning fossil fuels 39 Steeh 39 Kelo vs. 39 emitting greenhouse gases 39 Greenhouse gases 39 earmark laden 39 Lawful Commerce 39 promulgate 39 constitutionally flawed 39 constitutionality 39 bars bowling alleys 39 Electric Reliability Coordinating 39 appeals court 39 gases emitted 39 greenhouse gases GHG 39 Free Roaming Horses