Related by context. Frequent words. (Click for all words.) 67 manure 55 cow dung 53 biogas 53 dung 52 compost 50 sawdust 50 biosolids 50 sewage sludge 50 digester 48 methane 48 wood chips 47 dairy cows 46 horse manure 46 biodiesel 45 organic fertilizer 45 composting 45 woodchips 44 biomass 44 cows 43 droppings 43 Manure 42 landfill 42 ethanol 42 hay 42 compost pile 42 carbon dioxide 42 grass clippings 42 dairy farm 42 waste 42 excrement 42 poop 42 dirt 42 dog poop 42 Landfill 42 dairy farmer 41 alfalfa 41 byproducts 41 cobs 41 corn stalks 41 cow 41 dairy cow 41 silage 41 dairy 41 Compost 41 biofuel 41 methane gas 41 poo 40 composted 40 whey 40 smelly 40 bio diesel 40 landfills 40 dairy farms 40 Methane 40 stinky 40 slurry 40 pig 40 switchgrass 39 sludge 39 goat milk 39 wood pellets 39 anaerobic digestion 39 peat moss 39 bioethanol 39 fecal matter 39 effluent 38 dairies 38 milk 38 wastewater 38 barnyard 38 renewable 38 carbon sequestration 38 bioenergy 38 Biodiesel 37 greenhouse gases 37 propane 37 locally grown 37 fossil fuel 37 lignite 37 flatulence 37 organic 37 milking cows 37 fertilizer 37 maple syrup 37 geothermal 37 Composting 37 topsoil 37 corn ethanol 37 syngas 37 renewable energy 37 compressed air 37 briquettes 36 faeces 36 animal carcasses 36 bovine 36 farm 36 Dairy 36 biofuels 36 contaminated soil 36 feces 36 swine