Otto built the practical four-stroke internal combustion engine called the "Otto Cycle Engine, " and as soon as he had completed his engine, he built it into a motorcycle.

奥托制造了第一台实用的四冲程内燃机，叫做“奥托循环发动机”，并且当完成制造他的发动机后他就把发动机安装在摩托车上。

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The authors do not analyse individual countries, but Majeau-Bettez estimates that the global warming impact of an EV car driven in the UK is about 10% better over its life cycle than that of a car with an internal combustion engine.

BBC: How environmentally friendly are electric cars?