Related by context. Frequent words. (Click for all words.) 51 nitrogen oxide NOx emissions 49 heat trapping gases emitted 49 smog forming pollutants 49 greenhouse gas emissions 49 carbon dioxide emission 48 greenhouse gases 48 smokestack emissions 48 carbon emissions 48 carbon dioxide emissions 47 greenhouses gases 47 greenhouse emission 47 emmissions 47 smog forming nitrogen oxides 47 greenhouse emissions 46 Co2 emissions 46 heat trapping carbon emissions 46 fossil fuel 46 GHG emission 46 warming gases 46 greenhouse gasses 46 polluting gases 46 pollution 45 carbon emission 45 sulfur dioxide emission 45 carbon dioxide CO2 emissions 45 SO2 emissions 45 emissions 45 CO ² emissions 45 greenhouse gas 45 greenhouse gas emission 44 greenhouse gases GHGs 44 greenhouse gases GHG 44 pollutant discharge 44 CO2 emissions 44 mercury emissions 43 sulfur dioxide nitrogen oxide 43 carbon emission reductions 43 tarrifs 43 emit CO2 43 CO -2 43 sulfur dioxide emissions 43 supermajority requirement 43 mercury emitted 43 heat trapping gases 42 fossil fuels 42 sulfur oxide 42 PRB coal 42 smog forming 42 Carbon dioxide emissions 41 wealthiest estates 41 CO2 emission 41 air pollution 41 capital expenditure CAPEX 41 C# emissions 41 nitrogen oxide emissions 41 particulate emissions 41 emission 41 heat trapping gasses 41 CO2 41 carbon emitter 41 GHGs 41 Industrialised countries 41 mercury pollution 41 emission reductions 40 carbon dioxide 40 GHG reductions 40 megatonnes 40 co2 40 heat trapping carbon dioxide 40 By Laurie Kulikowski 40 legally binding emission 40 smog forming emissions 40 potent greenhouse gas 40 GHG emissions 40 soot pollution 40 nitrogen oxide NOx 40 coal fired 40 particulate matter emissions 40 decarbonisation 40 greenhouse gas GHG emissions 40 landfilling 40 pollutant emissions 40 polution 40 curbing carbon emissions 40 By Julian Pecquet 39 coal 39 protectionist tariffs 39 Amazon deforestation 39 Kyoto Protocols 39 emitting carbon dioxide 39 CO2 emission reduction 39 GHG emission reduction 39 iron ore lumps 39 nontariff barriers 39 xxx domain name 39 groundwater withdrawals 39 toxic pollutant 39 CO ² 39 CAFE standards 39 Cancellation fees 39 PURPA