Biogas Farm manure in methane production Agricultural wastes Environmental aspects Antibiotics in agriculture Economic aspects Chesapeake Bay (Md. and Va.) Environmental conditions Climatic changes Economic aspects Forecasting Climatic changes Forecasting Dairy cattle Behavior Climatic factors Forecasting Dairy cattle Effect of global warming on Forecasting Drug resistance in microorganisms Economic aspects Drug resistance in microorganisms Prevention Greenhouse gas mitigation Greenhouse gas mitigation Economic aspects Mathematical models Heat Physiological effect Forecasting Livestock farms Environmental aspects Livestock farms Waste disposal Livestock farms Waste disposal Economic aspects Mathematical models Livestock productivity Management Health aspects Manures Environmental aspects Milk yield Forecasting Nutrient trading Veterinary drug industry Veterinary drugs Safety measures Water Pollution Total maximum daily load