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3 votes
3 answers
253 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? ...
user3418765's user avatar
9 votes
2 answers
192 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 ...
Jonathan E. Landrum's user avatar
8 votes
3 answers
14k views

Impact on environment: a million horses vs a million cars

Would commuting on a horse be more eco-friendly? What if there were millions of people did that? Would millions of horses be better than millions of cars?
Ascendant's user avatar
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