> *8.9% ? Is a significant difference?* Yes, but how much of it is due to improv... | Hacker News

Hacker News new | past | comments | ask | show | jobs | submit

login

lazyjones on April 13, 2019 | parent | context | favorite | on: Emissions fall in Madrid city center thanks to new...

> 8.9% ? Is a significant difference?

Yes, but how much of it is due to improvements in newer combustion engines and new EU-wide emission norms?

adrianN on April 14, 2019 [–]

The improvements would have to be either massive, or the fraction of new cars on the road would have to be much higher than I'd expect.

Consider applying for YC's Spring batch! Applications are open till Feb 11.
Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact