Increasing use of biofuels would bring down the U.K.'s pollution levels more cost effectively than by putting more electric vehicles on the road, according to a BP-funded study by U.K.-based Element Energy. Internal combustion engines will still dominate the market through 2030, the study found, so biofuels will play a major role in the U.K.'s carbon-reduction efforts. Using biofuels would cost U.K. consumers about $21 more per year, on average, compared with about $315 for electric vehicles, the study found.

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