Questions tagged [transport]

moving people or freight from one place to another. This includes use of cars, trucks, buses, aircraft, watercraft, as well as non-fuel-intensive transportation. For questions specifically about cars use that tag.

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40
votes
8answers
29k views

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

I know some countries enforce having cars automatically shut down the engine when stopping at a traffic light. How much resources are really saved by this process? Does the car need to be ...
33
votes
3answers
3k views

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

Given the fact that the average lifetime for a car battery is 3 years and all of the batteries end up at a landfill at the end of their lifetime, how sustainable are electric cars in providing a ...
31
votes
3answers
700 views

Impact of various travelling options

Are there any objective resources to estimate the ecological impact of various travel alternatives? Sites like Bahn.de offer to calculate it, but they obviously favour trains. I've asked a question on ...
26
votes
7answers
4k views

Lowest impact transatlantic crossing

What is the lowest-impact regular¹ method to cross the Atlantic Ocean? Specifically, which method has the lowest carbon dioxide equivalent emission per passenger-kilometre? I'm aware there are other ...
23
votes
3answers
1k views

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

I purchased a Prius many years ago, but many of my friends have put forth claims that the batteries are very toxic and thus I may in fact be creating more harm than good in using a hybrid and that ...
20
votes
4answers
761 views

How to drive to be the most fuel efficient

I saw a poster at a thruway rest stop once that said something along the lines of accelerating quickly is worse for fuel efficiency and carbon emission than idling for several hours (I don't remember ...
17
votes
2answers
5k views

When does using a car's start-stop system become more economical?

In this question it was asked how economic it is to turn your car's engine off when waiting for a traffic light. In the accepted answer it is said that it becomes more economical to turn it off if you ...
16
votes
2answers
411 views

Is buying online more sustainable than in local shop next door?

I was planning to buy a toy. I can buy it online and in local shop next door. Price is (including shipping in case of online shop) more or less the same. Is one more sustainable than the other?
12
votes
2answers
126 views

Home delivery versus going to stores: how does fuel usage for transport compare? Any studies available?

We see more and more trucks riding through our streets delivering individual items. This hardly looks sustainable. I wonder how the transport footprint compares with the 'old' delivery model of ...
11
votes
3answers
812 views

Most environmentally friendly mode of transport

You often hear "Walk, it's better for the environment", but is that actually true? If I walk 5 miles instead of taking say a public bus, given that I now will need to replace the energy I spent ...
11
votes
1answer
123 views

What are the sustainability issues in moving house?

We are moving house from one side of the UK to the other. The financial costs of doing so have raised the facetious question would it not be cheaper to sell everything here and buy it again, there? ...
10
votes
1answer
1k views

How sustainable are cargo airships compared to current cargo shipping methods?

After reading the article Super-zeppelin: Revolutionary airship may become cargo-carrying champion, where the authors describe the progress in research and development in A functioning prototype of ...
9
votes
1answer
134 views

What is the share of global human CO2 emission of cargo transport by ship?

I had an argument how bad global economic trade flows really are. The question was in particular how bad worldwide transports on cargo vessels (containers, ...) are in terms of CO2 production as well ...
8
votes
2answers
2k views

Is my car more sustainable with or without an EGR?

I drive a 2003 Volkswagen Jetta with a 1.9 liter turbo-diesel engine. I often get well over 50mpg on the high way, and I love the fact that I have such a fuel-efficient car that is also fun to drive. ...
8
votes
3answers
263 views

Sustainablity of Telecommuting

I'm looking for sources that can give some reasoned arguments about Telecommuting in sustainablity terms - how much of an energy costs in there to working at home compared with commuting X miles in Y ...
8
votes
5answers
216 views

How can I make my family understand my CO2-emissions-related hesitation to fly in order to spend time with them?

I live in another country, approximately 2000 miles away from my family. Now, my parents have really hard time understanding the kind of personal sacrifices which are necessary to keep the world a ...
8
votes
6answers
219 views

What is required to make air travel sustainable?

Is there a plausible scenario where humans can continue traveling in airplanes? I have heard that airplanes create a tremendous amount of greenhouse gas emissions, the global number of air miles ...
8
votes
2answers
155 views

How to choose a more sustainable vacation option?

Background In general, for a given transportation medium, modes of transport that are more densely populated are more efficient than those that are more sparsely populated. For example, it is not a ...
8
votes
1answer
92 views

Are trolleybuses better, worse, or about the same, as streetcars in terms of sustainability?

The one advantage they have is they don't need tracks, just overhead cables. Thus, only the rolling stock requires any serious maintenance. Implementing a trolleybus system in any city would be ...
8
votes
1answer
194 views

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

In Australia, most cars are automatic, and most people stay on "drive" while braking when stopped at a red light (i.e. if they weren't breaking, the car would drive forward). I was wondering if ...
8
votes
1answer
94 views

Is sustainable passenger traffic across the Atlantic possible?

The current preferred means of travel from New York to London or Paris is the jet plane. Which is a shame, because: It is poorly designed. The fact that "it is the best we can do" is no excuse. It's ...
7
votes
5answers
658 views

What measures could be taken to decrease the air pollution in a big city?

I live in Madrid, where like in most big cities there is a high level of air pollution, especially due to the traffic. The levels of pollution reached the maximum allowable level a couple of months ...
7
votes
2answers
106 views

Curbing non-exhaust (non-tailpipe) transport emissions of particulates

Small particulate matter (PM10, PM2.5) is a nasty pollutant that is prevalent in a lot of cities. Some of these emissions come from exhausts (tailpipes); regulation has spurred on technological ...
6
votes
2answers
207 views

Is flying more sustainable than taking the train?

This paper argues that flying and taking the train compares in terms of energy - can this really be true? I am thinking that energy is a reasonable measure of sustainability although comparing ...
6
votes
1answer
122 views

How does transportation cost depend on food?

Given that two foods requiring refrigeration have the same weight and volume and are being shipped from one location to another via the same method, how does the environmental impact of that ...
6
votes
1answer
139 views

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

Cars have large overheads in terms of energy, materials, physical space requirements, accident casualties, and local & global pollution. But, particularly in anglophone countries, few ...
6
votes
2answers
147 views

How does the climate impact of an LNG-powered cruise ship compare to flying?

Taking the Iona as an example, it is claimed that "The cruise ship will have a reduced carbon footprint with zero sulphur and nitrogen emissions." Sulphur and nitrogen, while pollutants, are not ...
5
votes
2answers
110 views

When transporting high-end food stuff from Chita to Moscow, which method is more fuel efficient, by rail or by air?

Chita is a Russian city nestled between Mongolia and Manchuria. Although Chita is located on the trans-siberian railway, I wonder if it is more energy efficient to ship 100 tons of cut beef every day ...
5
votes
1answer
65 views

Comparative impact of individual airlines

Are there any significant differences to the ecological impact of flying based on which airline you choose? The Guardian seems to suggest that maximizing economy seats per plane could help determine ...
5
votes
1answer
228 views

Is an electric vehicle more sustainable just because it runs on batteries? [duplicate]

So, is driving an EV (like the Tesla Model S) actually sustainable? Does it not matter how the actual power/energy was created? Does this matter?
5
votes
1answer
85 views

Is delivery of mail to house doors by postal services more sustainable than picking up mail from a central location?

Today there exists more than one mail and parcel services to distribute deliveries. I wonder about sustainability effects, especially when you receive several deliveries a day. When everybody has to ...
4
votes
2answers
148 views

Being a sustainable Digital Nomad in a Van - First Steps

I am considering the purchase of a retrofitted Ford Transit with a Diesel motor to have a more flexible option for travel and accomodation. Since I aspire to reduce my footprint (and increase my ...
4
votes
5answers
52 views

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

I am looking at ways in which a heavily polluting taxi rank near a train station could reduce its pollution footprint. My first thought was that the pollution was mostly down to idling and I am ...
4
votes
2answers
390 views

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

I have asked a few people whose cars are idling if they mind switching them off to reduce pollution. One response I get from quite a lot of people is that they need to keep the car running to enable ...
4
votes
1answer
70 views

How much increase in GHG emissions is caused by Amazon Prime?

From Wikipedia: Amazon Prime is a paid subscription service offered by Amazon that gives users access to free two-day delivery (one-day in some areas) [...] and other benefits for a monthly or ...
4
votes
1answer
40 views

Larger package or more local source?

Is it possible to calculate impact of more packaging versus farther transportation? The two options are: 1. say: two half-litre glass bottles with local (made-in-this-country) oil; 2. say: 1 litre ...
4
votes
1answer
75 views

Can Asphalt and concrete be recycled at long term?

Asphalt and concrete are substances where a lot of heavy metals and other materials being hazardous to one's health are being "deposited". But what to do with them when concrete and asphalt have ...
3
votes
3answers
109 views

Why are new cars being built in the UK / europe without Start-Stop technology when it seems it can lower pollution?

Everything I have read online seems to indicate that start / stop technology reduces air pollution, is (marginally) better for the engine, reduces emissions and is more economical (link1, link2, link3)...
3
votes
1answer
56 views

Costs of transportation

I assume that it makes sense to ask for the energy costs of transportation of different goods per weight and volumetric mass density, depending on the means of transportation (truck, train, ship, etc.)...
3
votes
0answers
34 views

Plane and train greenhouse emissions - comparison taking infrastructure in account or not?

In the news or various other places, we see often that train travel produces significantly less greenhouse gas than air travel, without much information about how this is calculated. For example here :...
2
votes
1answer
56 views

To what extent do CO2 emissions from motor vehicles vary?

Do the CO2 emissions from petrol / gas vehicles vary depending on driving style? Are emissions a function of the engine type or the fuel efficiency? If a motor car is rated at 105 g/km, but it is ...
2
votes
3answers
82 views

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

I have repeatedly heard from various car enthusiasts that start stop technology has no benefit in improving air quality (or the tiniest smallest negligble benefit). Does it have an effect and how much?...
2
votes
3answers
157 views

Method of transport with decent speed/low cost without a driving license?

I'm looking for something a little bit better than your average bike in terms of transportation potential, but cannot be a license-required vehicle as I cannot get a driver's license. I also don't ...
2
votes
1answer
97 views

In which cities “free” public transportation generated positive impact, no impact or negative impact to sustainability?

In Europe there are discussions about free public transportation to reduce pollution in cities. Even when in Germany first attempts failed due to economical and political arguments, the discussion ...
2
votes
1answer
64 views

Are there examples of (more) sustainable scientific conferences?

Scientists frequently speak out about the dangers of climate change, and I'm sure there are many scientists who make concious choices for their own lives with a view towards sustainability. But are ...
2
votes
2answers
73 views

Should I use a plastic trash bag for my recycling bin at home or not?

I want to have a recycling bin at home in addition to a trash bin. Should I line my recycling bin with a trash bag and bag it up when it's full to toss in the dumpster's recycling bin? Or should I ...
2
votes
2answers
96 views

How to persuade people that scrappage schemes & suchlike are a bad idea?

One idea frequently cited as a way of reducing pollution is the use of scrappage schemes and low-emission zones to persuade people to replace their old cars with newer, 'more efficient' ones. IMHO ...
2
votes
1answer
87 views

5 Questions to indicate carbon impact

It looks like I will have the opportunity to add a few (probably only 5) questions to a questionnaire to get an indication of the persons carbon footprint. The questions I am think of are: 1) How ...
2
votes
1answer
28 views

How do you design a taxi rank rank that enables taxi drivers to charge their electric vehicles whilst waiting for fares?

This post deals with the design of a taxi rank and how to reduce the pollution created by idling and edging foroward. A few answers suggested that making the taxis switch to hybrids, or even better ...
2
votes
0answers
46 views

What kind of population-to-agriculture relationship is the most sustainable? [closed]

City/Rural Relationship High concentration of humans and low concentration of agriculture that are largely fed by areas outside the city that are very low in human population but are very high in ...