| Similarity | Rank | |
|---|---|---|
| digester | 0.880 | 85063 |
| gasification | 0.867 | 64900 |
| cogeneration | 0.861 | 76666 |
| biomass | 0.857 | 16091 |
| feedstock | 0.796 | 46681 |
| Biomass | 0.787 | 50798 |
| biochar | 0.779 | 81934 |
| bioenergy | 0.776 | 65798 |
| biofuel | 0.774 | 33305 |
| feedstocks | 0.771 | 76964 |
| biodiesel | 0.757 | 28801 |
| renewable | 0.756 | 6153 |
| hydropower | 0.751 | 38989 |
| gas-fired | 0.750 | 70372 |
| hydro-electric | 0.746 | 98559 |
| biofuels | 0.740 | 26111 |
| composting | 0.739 | 23375 |
| wastewater | 0.733 | 17337 |
| geothermal | 0.733 | 21905 |
| methane | 0.728 | 19799 |
| LPG | 0.724 | 42074 |
| hydroelectric | 0.721 | 35239 |
| incineration | 0.719 | 62397 |
| incinerators | 0.719 | 86069 |
| photovoltaics | 0.717 | 66103 |