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.

Filter by
Sorted by
Tagged with
-4
votes
0answers
21 views

Tell me all about biofuels

Tell me all about biofuels, please (and don't close it down for a lack of focus or prior research as you like to do). I know you can anaerobically decompose any type of organic waste with methane as a ...
22
votes
8answers
6k views

Is driving an electric car any better than driving a conventional car if electricity is generated with fossil fuel?

Is driving an electric car any better, GHG-wise, than driving a conventional car if 100% of its electricity is generated by fossil fuel combustion? Are there any peer-reviewed studies of that?
24
votes
5answers
2k 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 ...
3
votes
4answers
4k 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
2answers
114 views

Lowest energy use per passenger-km, electric bicycle or electric unicycle?

Which uses less electrical energy per passenger-km (pkm) travelled? Electric bicycle (with a single rider) Electric unicycle (aka. self-balancing personal transporter) I have heard that a standard ...
2
votes
1answer
64 views

How efficiently do different vehicles convert stored energy to kinetic energy?

I came across this interesting infographic from the U.S. Department of Energy: They provide a figure of 12 to 30% efficiency of a gasoline vehicle converting fuel energy into forward motion (or ...
1
vote
1answer
55 views

What hydrocarbons are produced by a diesel motor?

HC (I assum hydrocarbons) is a column in the euro emission standards for trucks & buses. Which hydrocarbons are produced and at what quantities? Would the particulate matter emissions be included ...
2
votes
1answer
158 views

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

I remember seeing many news articles and posts on social media saying that a single container ship pollutes as much as 50 million cars. Is this true? How could that be possible? https://tech.slashdot....
5
votes
3answers
116 views

Electricity need to switch all cars from fossil fuel

For purely hypothetical discussion, I was asking myself how big electrical production increase would be needed for a first-world country when switching all cars from fossil fuel to EV only. I made the ...
1
vote
2answers
63 views

What is the climate impact of shared electric kick scooter systems?

During the last few years, shared electric kick scooter systems such as Voi and Tier have become common where I live. The system consists of a number of shared electric kick scooters scattered around ...
42
votes
9answers
32k 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 ...
4
votes
1answer
108 views

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

This week, the UK announced that sale of gasoline and diesel cars will be banned by 2035. This new policy moves the date up by five years, and also includes hybrid vehicles. From 2035 on, only ...
2
votes
1answer
37 views

Does a single Euro VI bus really release less NOx than a euro 6 diesel car?

A transport expert claimed that a Euro 6 car has fewer NOx emissions than a Euro VI bus, surely this cannot be correct?! https://en.wikipedia.org/wiki/European_emission_standards Euro 6b (diesel car) -...
4
votes
2answers
115 views

How much weight would a wireless charging system add to an electric bus?

Wireless charging requires a number of 'receiving charging pad's and a 'management module' and I imagine there will be additional wiring. How much extra weight does this add to an electric bus?
4
votes
1answer
88 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 ...
2
votes
1answer
69 views

Are there long-distance water pipelines emanating from the North American Great Lakes region? Why or why not?

Are there long-distance water pipelines emanating from the North American Great Lakes region? Why or why not? Under what circumstances would this be an ecologically reasonable way to provide water to ...
3
votes
3answers
101 views

Efficiency of delivery services vs individuals travelling to purchase items?

Is it more efficient for a supermarket to send a van round to deliver stuff (eg a weekly/monthly shop for groceries) to multiple addresses, or for those people to drive (locally) to go and get it? ...
19
votes
2answers
505 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?
1
vote
1answer
36 views

What is the difference in CO2 emissions between new and old double decker buses?

The Euro 6 bus WHTC test cycle here shows a value of 4.0 carbon dioxide and the Euro 5 ESC & ELR test cycles show a value of 1.5 CO. https://en.wikipedia.org/wiki/European_emission_standards It ...
10
votes
8answers
447 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 ...
15
votes
4answers
969 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 ...
7
votes
1answer
341 views

How much CO2 does a plane produce per additional kg of weight?

There are many figures regarding how much CO2 is emitted per passenger and per km. However, I have not been able to find anywhere how much CO2 would an airplane emit if it has to carry an additional ...
6
votes
3answers
147 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 :...
7
votes
2answers
146 views

How much of a reduction of carbon emissions can be achieved if a diesel bus is switched out for electric?

My city council has pledged to try and be carbon neutral by 2030 as part of the Global Covenant of Mayors and are investigating ways to achieve that. I'd like to bring forth an idea to replace our ...
5
votes
4answers
80 views

How to design a taxi rank to charge 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 ...
4
votes
5answers
75 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
1k 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 ...
3
votes
3answers
125 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)...
1
vote
1answer
31 views

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

Drivers often floor it at the lights, a large number switch off their start/stop systems, they might idle for an hour to listen to the radio, exceed the speed limit and exhibit other inefficient ...
0
votes
1answer
575 views

If I plan to drive on soft ground, what can I do to avoid sinking in?

I'm expecting tons of wood chips to be dropped off in part of my yard every day this year, and am wondering what I need to do so the arborist can easily drop them off as close to where I want them as ...
3
votes
3answers
94 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?...
6
votes
2answers
202 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 ...
3
votes
2answers
86 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 ...
3
votes
1answer
75 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
1answer
69 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 ...
3
votes
1answer
65 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.)...
8
votes
5answers
721 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 ...
2
votes
2answers
107 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 ...
9
votes
6answers
239 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 ...
6
votes
1answer
95 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 ...
29
votes
7answers
6k 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 ...
4
votes
1answer
78 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 ...
15
votes
2answers
205 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 ...
1
vote
3answers
153 views

Mindset change in developing countries

I've travelled a bit in Africa, Middle East, and Asia. What strikes me, in all of these places, is that often in the most poverty-striken areas, things that people look up to are big cars, and ...
2
votes
1answer
113 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 ...
9
votes
2answers
174 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 ...
4
votes
2answers
157 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 ...
6
votes
2answers
225 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
125 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 ...
1
vote
0answers
86 views

What are the environmental consequences of shipping food across the Atlantic Ocean [closed]

For a given weight and volume of food requiring refrigeration, how much worse would US manufacturing need to be than Western European manufacturing to environmentally justify purchasing imported food? ...