| Lifebuoy's mostly made with green energy (7) |
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| Renewable source of power from living matter |
The Guardian Quick |
11 Nov 2022 |
| Converting one of blue or green power source |
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| Converting one of blue or green power source |
The Guardian Cryptic |
18 Apr 2022 |
| Brief attempt to introduce oil for petrol as a green energy |
Irish Times Crosaire |
26 Dec 2020 |
| Eco energy source |
Newsday |
10 Aug 2019 |
| Green energy option |
Eugene Sheffer |
03 Aug 2018 |
| Substitute for gas boiler's top half working with flue |
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| Curious university foible that avoids putting fossils into power |
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| Energy source often made from corn |
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| Ethanol, for one |
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| Ethanol, for one |
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