Wind - it's the future!

[pgn]

This little clip cheered me up! 

So much of what people consume is transported by ship... 

[Anonymous]

I always wonder how many extra resources we use building these fabulous looking things & whether the costs outweigh the benefits?

[pgn]

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@Anonymous wrote:
I always wonder how many extra resources we use building these fabulous looking things & whether the costs outweigh the benefits?

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I often wonder about that, but then I think of the difference a bit of chipped flint made to the business end of a straight bit of branch... 

Or how the wheel ended up the way we know it today... 

It's something to do with the law of diminishing returns, I guess. To be encouraged.