| Similarity | Rank | |
|---|---|---|
| fossil-fuel | 0.808 | 91442 |
| feedstocks | 0.769 | 76964 |
| feedstock | 0.761 | 46681 |
| low-carbon | 0.755 | 41607 |
| carbon-based | 0.753 | 97409 |
| biofuels | 0.751 | 26111 |
| petroleum-based | 0.747 | 79740 |
| cogeneration | 0.745 | 76666 |
| non-renewable | 0.742 | 56124 |
| gasification | 0.741 | 64900 |
| renewable | 0.738 | 6153 |
| fuels | 0.736 | 9417 |
| biofuel | 0.734 | 33305 |
| coal-fired | 0.734 | 36383 |
| labor-intensive | 0.731 | 54150 |
| uneconomic | 0.730 | 98288 |
| inefficient | 0.728 | 16136 |
| energy-efficient | 0.723 | 24948 |
| petrochemical | 0.719 | 40327 |
| photovoltaics | 0.717 | 66103 |
| polluting | 0.716 | 28346 |
| environmentally-friendly | 0.713 | 47015 |
| gas-fired | 0.712 | 70372 |
| environment-friendly | 0.711 | 74445 |
| petrochemicals | 0.710 | 64013 |