[xorfish]

Investments into public transport and bike infrastructure is relatively cheap and improves streets for everyone.

Taking a car lane and/or parking and making a dedicated bus and bike lane out of it will reduce congestion and increase the mobility of nearly everyone.

[adrianN]

Sure, but that is something that a poor person has very little influence on.

[xorfish]

Yes, I think the point still stands. A carbon tax is an efficient measure that will reduce emissions and not harm poor demographics.

However there are other things we can do as well to reduce emissions as well as increase life quality at the same time (improve public transport and bicycle infrastructure) where poor people benefit especially.