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Revision question · Environmental issues
Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

Lower sulphur content reduces sulphur-related emissions compared with higher-sulphur fuel. Anti-waxing and anti-foaming describe different properties, while red identifies rebated fuel. This does not make any diesel pollution-free or suitable for every engine.
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