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3 Subjects: “...fuel interchangeability...”

4 Subjects: “...full-factorial test...”

5 Subjects: “...fuel properties...”

6 “... into account solar PV's recent and growing lead among renewable energies competing to replace fossil fuels...”

7 “... the increasing use of renewable energy, the overall energy supply is dominated by fossil fuels. For a long period...”

8 “... the increasing use of renewable energy, the overall energy supply is dominated by fossil fuels. For a long period...”

9 “... and biofuels. It is the most reliable alternative to reduce fossil fuel consumption and greenhouse gas...”