Related by context. Frequent words. (Click for all words.) 69 EU ETS 57 Emissions Trading Scheme 49 Emissions 48 emission allowances 46 Regional Greenhouse Gas 46 emissions 46 GHG 45 ETS 45 carbon emissions 44 CO2 emission 44 carbon emission 44 carbon credits 44 emission reductions 44 emission reduction 42 Greenhouse Gas 42 CO2 42 Emission 42 carbon dioxide emissions 42 CO2 emissions 42 CERs 41 GHG emissions 41 Kyoto Protocol 41 reducing CO2 emissions 41 reduce carbon emissions 41 Carbon Capture 40 GHGs 40 carbon dioxide CO2 40 carbon dioxide emission 40 Climate Change 40 greenhouse gas 40 emission 39 Clean Development Mechanism 39 Clean Air 39 greenhouse gas emissions 39 greenhouse gases 39 UNFCCC 39 reducing carbon emissions 38 emitters 38 Air Transport 38 Kyoto protocol 38 RGGI 38 carbon 37 carbon capture 37 greenhouse gas GHG emissions 37 greenhouse gas emission 37 SO2 37 Montreal Protocol 37 IATA 37 carbon dioxide 37 Climate 37 Scandinavian Airlines 36 greenhouse emissions 36 aviation 36 carbon dioxide CO2 emissions 36 Aviation Safety 36 CCX 36 Kyoto accord 36 Low Carbon 36 carbon offsets 36 REDD 35 Climate Change UNFCCC 35 Climate Change IPCC 35 eurozone 35 renewables 35 geoengineering 35 Icelandic volcano 35 Climate Action 35 global warming gases 35 heat trapping greenhouse gases 34 offsets 34 scrappage 34 Civil Aviation 34 Open Skies 34 reduce greenhouse gas 34 Federal Aviation 34 World Trade Organisation 34 civil aviation 34 CDM 34 ash plume 34 heat trapping gases 34 CPRS 34 Carbon Disclosure Project 34 Carbon Trust 33 g km 33 sulfur dioxide 33 Lufthansa 33 Clear Skies 33 Air France KLM 33 Kyoto 33 Eurocontrol 33 Stansted 33 airlines 33 Migratory Bird Treaty 33 sulfur dioxide emissions 33 polluters 33 nitrogen oxide 33 climate change 33 carbon dioxide emitted 32 Sustainability 32 volcanic ash 32 Kimberley Process