Carbon Dioxide emissions question

Click For Summary

Discussion Overview

The discussion revolves around the impact of transitioning to electric or clean transportation on urban air quality, specifically focusing on the percentage of nitrous oxide and carbon dioxide emissions attributed to mobile sources compared to fixed sources like power stations and factories.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Necross questions the extent of air quality improvement if all transportation were to become electric or clean, seeking specific percentages of emissions from mobile sources.
  • One participant notes that the contribution of mobile sources to pollution varies by area, suggesting that in many cities, mobile sources are significant contributors, though fixed sources may overall contribute more in some regions.
  • This participant emphasizes the importance of local data from government sources to understand specific contributions to air quality issues.
  • Another participant, mgb_phys, argues that while emissions from power plants may be cleaner, their total emissions could increase due to higher demand from electric vehicles, complicating the overall impact on air quality.
  • There is a mention of the NIMBY (Not In My Back Yard) phenomenon in relation to nuclear power, suggesting a discussion about energy sources and their implications for air quality.

Areas of Agreement / Disagreement

Participants express differing views on the relative contributions of mobile versus fixed sources to air pollution, and the overall impact of transitioning to electric vehicles remains unresolved.

Contextual Notes

Participants reference local government data for emissions but do not provide specific figures, indicating a lack of consensus on the exact contributions of mobile and fixed sources to air quality issues.

Necross
Messages
34
Reaction score
0
I've been wondering recently about the air quality in cities. Suppose all cars/transport methods were to go electric or clean (electric cars etc...) how much would air quality improve by? In other words what % of the nitrous oxide and carbon dioxide emissions are mobile sources responsible for? I've been trying to look this up but can't seem to get a consistent number. Any help in clearing this issue would be appreciated.

- Necross
 
Earth sciences news on Phys.org
It depends on the area.
In most cities mobile sources are the source of most pollution, overall (for most countries) they are less than fixed sources - power stations/factories.
Your local government, city/municipality/state probably publishes local figures for their standards from local mobile/fixed sources.

You also have to consider the actual effects - smog from traffic exhausts emitted at street level in LA in summer has a bigger effect on the people than the same mass of the same chemicals emitted from a power station stack in the middle of nowhere.

If you are in the USA, start here http://www.epa.gov/oar/data/index.html
 
mgb_phys provided a fine static analysis.

The overall air quality might marginally improve for the higher quality emissions from power plants, but their total emissions would increase, with a constant pollutant fraction, as they pick-up the otherwise distributed transportation power demand.

For transmission efficiency, power plants are not far removed from major loads like cities.

NIMBY isn't good enough. Nuclear power is secure power.
 
I agree with Doug Huffman's view...
 

Similar threads

Replies
2
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
5K
  • · Replies 19 ·
Replies
19
Views
7K
  • · Replies 1 ·
Replies
1
Views
4K
Replies
6
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K
Replies
12
Views
2K
Replies
28
Views
28K
  • · Replies 186 ·
7
Replies
186
Views
93K