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7 votes
Accepted

Does 1 container ship really pollute as much as 50,000,000 cars?

It depends on how you define "pollution". Cargo ships use some of the dirtiest fuels available: bunker fuel is basically what's left over after you refine all the good stuff out of crude oil....
Mark's user avatar
  • 618
6 votes

To what extent do CO2 emissions from motor vehicles vary?

CO2 is produced by burning the carbon in the fuel, so if your driving style causes you to use twice as much fuel, you will produce twice as much CO2. Driving aggressively can have a big impact on ...
Mark's user avatar
  • 333
6 votes

To what extent (if any) are electric vehicle batteries recyclable?

Li-Ion batteries are worth recycling just for the lithium in them. This material can be re-refined, and made into new batteries. In this use they should show similar cost savings to recycled vs new ...
Sherwood Botsford's user avatar
6 votes
Accepted

Does putting an automatic car in neutral when stopped help save petrol?

According to this answer over on mechanics.SE, below a certain engine RPM, your vehicle automatically disengages the torque converter. That is to say, when stopped, there isn't a fundamental ...
LShaver's user avatar
  • 11.9k
6 votes

Which countries, regions, or cities have set a date to ban the sale of gasoline and diesel vehicles?

The best list is probably wikipedia: Phase-out of fossil fuel vehicles There is a good review from the World Economic Forum here, dated 2017, which discusses some of the different approaches taken, ...
M Juckes's user avatar
  • 1,021
4 votes
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The more miles a car drives, the more economical battery packs become?

The immediate previous sentence says: The other unknown that BNEF considers is the rise of autonomous cars and ride-sharing services like Uber and Lyft, which would all put more cars on the road ...
WBT's user avatar
  • 328
4 votes

To what extent (if any) are electric vehicle batteries recyclable?

It appears that currently (late December 2020), lithium from batteries is not recycled, because it is only worth 6 euro per kg (9 USD per kg). The only metals recovered from Li batteries are the ...
Fred's user avatar
  • 3,507
4 votes

Are there any unsustainable supply-chain issues unique to hydrogen fuel cell vehicles?

The favored anode catalyst in a hydrogen fuel cell is platinum(1) or another platinum-group element (e.g. palladium). The catalyst is required in small quantities for an individual fuel cell but of ...
Jean-Paul Calderone's user avatar
4 votes

Is there a business model to do carpentry without a vehicle?

No affiliation, but I have proof-ridden an Urban Arrow Tender at a large bicycle trade fair in Germany, and it would seem to fit a lot of stuff: Urban Arrow Tender. Source: Greenbike Shop ...
gerrit's user avatar
  • 2,649
3 votes
Accepted

EU Real Driving Emissions testing (RDE) - does it factor in real driver behaviour and the inefficient driving habits they often exhibit?

Under RDE [Real Driving Emissions test], a car is driven on public roads and over a wide range of different conditions..... Conditions include: Low and high altitudes Year-round temperatures ...
THelper's user avatar
  • 14.5k
3 votes

To what extent (if any) are electric vehicle batteries recyclable?

Battery recycling today is handled by 3rd parties. This leads to issues of economic value on materials extracted since they must cover a large variety of battery types and cannot specialize on any one....
pdobb's user avatar
  • 191
3 votes

Does Start / Stop technology in cars have an impact on air quality and by how much?

Idling is particularly bad for NO2 emissions, which are a major concern for air quality. Here's an old paper showing that an idling engine emits more NO2 than one driving at 40 km/h, despite emitting ...
Chris H's user avatar
  • 2,126
3 votes
Accepted

What are the carbon emissions from the manufacture of the hybrid components of a Prius?

Update. In my original answer I inadvertently divided at one point when I should have multiplied -- I found the mistake thanks to comments from Frank and THelper. So here's a new tl;dr: By mile 4,000 ...
LShaver's user avatar
  • 11.9k
3 votes

The more miles a car drives, the more economical battery packs become?

The article is considering the total costs of ownership of electric vs internal combustion engined (ICE) cars, including purchase and running costs. One of the benefits of electric cars is that fuel ...
Flyto's user avatar
  • 3,711
3 votes

How to prevent older Diesel cars from emitting NOx, dust and smell?

By crushing the car and recycling the metal. That's how. Diesel cars are awful and there's pretty much nothing anyone can do about it, if the recent VW diesel cheating scandal hasn't already made ...
Ernie's user avatar
  • 426
3 votes

How to prevent pollution caused by a taxi rank? Is there a solution to the 'edging forward' cost of cars in a queue?

Have the taxis (*) fill two or more lanes (| |) leading to the station, with one ready to pick up the next passenger (:)) coming out. |*|*| |*|*| |*|*| |*|*| :) * Once that cab ...
LShaver's user avatar
  • 11.9k
3 votes

How to prevent pollution caused by a taxi rank? Is there a solution to the 'edging forward' cost of cars in a queue?

A variant of the system suggested by @LShaver, would be to use the numbered ticket system sometimes found in supermarket deli counters. Each arriving taxi takes a sequentially numbered ticket (which ...
Nick C's user avatar
  • 783
3 votes

How to design a taxi rank to charge electric vehicles whilst waiting for fares?

You could have a number of electric charging booths dedicated to taxis which consist of a parking space and an electrical charging point. We allow a maximum of 3 taxis to wait directly outside the ...
atreeon's user avatar
  • 667
2 votes

How effective is turning a car's engine off while standing at a traffic light?

Nobody who turns off their engine ever mentions the fact that restarting their engine causes a slight delay in getting away and must result in increased congestion. This will increase the fuel ...
John Heaton's user avatar
2 votes

Are electric cars as environmentally friendly as we think they are?

The answer to this depends on your assumed alternative. Electric vehicles are better than some traditional gas-fueled cars, but hybrids can have an even larger footprint than efficient combustion ...
Jennifer Rae Pierce's user avatar
2 votes

How effective is turning a car's engine off while standing at a traffic light?

My 95 Accord MT went from ~28.5mpg to ~32mpg easily from mostly shutting off at stoplights, even as little as 7sec or more. About 10%-12% increase in mpg. I also use engine breaking and conserve ...
Richard's user avatar
  • 21
2 votes

Can alloy wheels (for a car) pay for themselves through fuel savings?

Wheel price is low If you buy for fuel economy, then scuffed wheels from a scrapyard search service or classified ads are OK. "$600 for a set of alloy wheels. Given the costs I saw at Tiretown ... ...
veg-buildlog.blogspot.co.uk's user avatar
2 votes

documented research on best practice for encouraging behaviour change towards more sustainable transport?

Some interesting work on this problem is being done by researching university campuses as "microcosms" of society. I recently came across a paper that used my school, the University of Wisconsin-...
LShaver's user avatar
  • 11.9k
2 votes

What is the environmental impact of replacing a vehicle?

This is more of an elaborate comment on the answer by the user "That Idiot" to demonstrate how we can do calculations on these things. Using this resource (sorry, in Dutch), I assumeā€¦: a car has ...
Ideogram's user avatar
  • 141
2 votes

How to prevent older Diesel cars from emitting NOx, dust and smell?

It largely depends on the sort of driving you do - if you do lost of short journeys, buy petrol (or electric), if you mostly do long journeys, buy Diesel. The best thing you can do to reduce the ...
Nick C's user avatar
  • 783
2 votes

How to determine whether hybrid cars are really more sustainable than traditional cars?

I find the site CarbonCounter.com, developed by MIT, useful in approaching this question. You can play around with some of the assumptions on e.g electricity supply, battery manufacture emissions and ...
andyyy's user avatar
  • 183
2 votes

Does Start / Stop technology in cars have an impact on air quality and by how much?

A car stationary but left running (idling) will cause pollution in that specific location; start stop technology could avoid the pollution responsible for idling. Here I will concentrate not on the ...
atreeon's user avatar
  • 667
2 votes

Mindset change in developing countries

What those countries has in common are non-existant infrastructure like banking system, electricity and sewage. So comfort in everyday life is not there. A good car delivers instant gratification. ...
Aus's user avatar
  • 171
2 votes

Preventing idling - ideas to keep warm in a car when the engine is off and it is cold outside

Wear a woolen underlayer (woolen socks + woolen long sleeve t-shirt + woolen long pants) Wear warm clothes (hat, snood, scarf, warm jumpers, warm trousers) Wear winter driving gloves (or any warm ...
atreeon's user avatar
  • 667
2 votes

Preventing idling - ideas to keep warm in a car when the engine is off and it is cold outside

It's possible to fit a dedicated heater run off the fuel system. This is a much more efficient way of turning fuel into cabin heat. They're common in motorhomes in a form that directly heats the ...
Chris H's user avatar
  • 2,126

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