The use of lead-free petrol is now being phased in.

哦，对了！ 这部车子是用普通的无铅汽油。

youdao

If the petrol used in motor vehicles were lead-free, then it would be possible to filter exhaust fumes which are a major cause of pollution.

如果机动车使用的汽油是无铅的，那么，我们将有可能过滤掉那些引起污染的废气。

youdao

Differential tax rates on lead-free petrol have encouraged drivers to switch en masse to it.

ECONOMIST: British election briefing: Transport

Just as America's adoption of catalytic converters led eventually to the world's conversion to lead-free petrol, so its drive to clean-energy technologies will ensure that these too spread.

ECONOMIST: Climate change