Related by context. Frequent words. (Click for all words.) 79 Carbon Emissions 76 Greenhouse Gas Emissions 71 Greenhouse Gases 70 Fuel Costs 70 Hybrid Cars 69 Emissions 65 Carbon Dioxide 65 Fuel Efficient 64 Fuel Consumption 64 Carbon Offsets 64 Nuclear Plants 64 Cut Costs 63 Fuel Efficiency 63 Jobless Claims Drop 63 Jobless Claims Fall 63 Fossil Fuels 63 Price Hikes 63 Jobless Claims Rise 62 Costs Rise 62 CO2 emissions 62 Stocks Soar 62 Hybrid Vehicles 62 Nuclear Reactors 61 Stocks Climb 61 Gasoline Prices 61 Carbon Offset 61 Improve Efficiency 61 Reduce Debt 61 Offsets 61 Stocks Retreat 61 Weak Dollar 60 Prices Drop 60 Greenhouse Gas 60 Coal Fired Power 60 Stocks Slump 60 Oil Prices Climb 60 Wholesale Prices 60 Solar Panels 60 Economic Slowdown 60 Oil Prices Slip 60 Less Than Expected 59 Japanese Stocks Rise 59 Dollar Weakens 59 Toxic Chemicals 59 Environmentally Friendly 59 Commodity Prices 59 Stocks Decline 59 Cost Cutting 59 Reduce Costs 59 Unemployment Rises 59 Budget Deficit 59 Stocks Rebound 59 Rate Hikes 59 carbon dioxide emissions 59 Job Losses 59 Inflation Fears 59 Spending Cuts 59 Recession Fears 59 Says ABI Research 59 Diesel Engines 59 Economic Woes 59 Ad Spend 59 Housing Slump 59 Sales Slump 58 Stocks Slip 58 Ad Spending 58 Jobless Benefits 58 Gas Prices 58 Hidden Costs 58 Trade Surplus 58 Price Hike 58 Weak Economy 58 Panel Urges 58 Rate Increases 58 Report Finds 58 Profit Jumps 58 Economy Grows 58 Cost Savings 58 Lowest Level 58 Growth Slows 58 Edges Up 58 Stocks Plunge 58 carbon emissions 58 Stocks Finish 58 Rate Hike 57 Inflation Rises 57 Stocks Dip 57 Rethinks 57 Profits Rise 57 Cell Phone Use 57 Prices Continue 57 Missile Shield 57 Profit Drops 57 Privacy Concerns 57 Stocks Drop 57 Tax Hikes 57 Fastest Pace 57 Down Slightly 57 Tax Breaks 57 Stocks Poised 57 Traffic Congestion