Related by context. Frequent words. (Click for all words.) 69 EPA Proposes 65 Mild Weather 64 Cholesterol Levels 64 Wintry Weather 64 Environmental Impacts 64 Brush Fires 63 Heating Costs 63 Ethanol Production 63 Toxic Chemical 63 Corn Crop 62 Greenhouse Gases 62 Icy Roads 62 Wet Weather 62 Than Thought 62 Radiation Exposure 62 Gas Emissions 62 Blood Vessels 61 Reduces Risk 61 Immune Cells 61 Slick Roads 61 Fuel Spill 61 Oil Spill Cleanup 61 Warmer Weather 61 CO2 Emissions 61 Blood Flow 61 Heavy Rains 61 Biodiesel Production 61 Allergy Sufferers 61 Drying Up 61 Obese Patients 60 Holds Promise 60 NASA Spacecraft 60 Antibiotic Resistance 60 Cleanup Continues 60 Bitter Cold 60 Flu Virus 60 Flame Retardants 60 Dog Rescued 60 Operational Costs 60 Sage Grouse 60 Staph Infections 60 Acidification 60 Freezing Rain 60 Sewage Spill 60 Brain Function 60 Cancer Causing 60 Greenhouse Gas Emissions 59 Lower Blood Pressure 59 Reduce Stress 59 Low Carb Diet 59 Brain Cells 59 Causes Concern 59 Flight Delays 59 Chemical Leak 59 Bird Flu Outbreak 59 Lower Cholesterol 59 Obesity Rates 59 Cut Emissions 59 Reduce Risk 59 Methyl Bromide 59 Lactic Acid 59 Flu Cases 59 Past Decade 59 False Alarms 59 Extinctions 59 Gum Disease 59 Growth Spurt 59 Carbon Emissions 58 Forces Evacuations 58 Significantly Reduce 58 Fossil Fuels 58 Study Proves 58 SARS Cases 58 Residents Urged 58 Increases Risk 58 Causes Problems 58 Productivity Gains 58 Blood Vessel 58 Pollutant 58 Boost Output 58 Raw Sewage 58 Ocean Acidification 58 Carbon Monoxide Poisoning 58 Deaths Blamed 58 Cause Problems 58 Advisory Issued 58 Water Contamination 58 Related Deaths 58 Different Types 58 Conserved 58 Winds Cause 58 Contaminant 58 Corn Soybean 58 Carbon Sequestration 58 CO2 Reduction 58 Fruit Flies 58 Drug Resistant 58 Cold Snap 58 Cost Structure 58 Breast Cancer Risk 57 Ammonia Leak