замыкаются на природу

[gogolesque]

please help with this...
замыкаются на природу???
thanks!

context:
При внимательном рассмотрении становится ясно, что оба обмена основываются на использовании природных ресурсов: для обмена “человек — природа” это очевидно, но и в обмене “человек — человек” в той или иной форме участвуют природные материалы, т. е. оба обмена замыкаются на природу. Таким образом, возникает “треугольник обмена” “человек — природа — человек” (рис. 1).

[kintorov]

are left to environment/nature

[alk]

lock, close to
imho - the same as for connections/arrows in chart or scheme.

[felog]

are exposed to

[pupil]

может, просто connected? Ну, по сути. как электрические соединения

[gogolesque]

so, both exchanges are close to nature?

[pupil]

можно перефразировать. Природа участвует в обоих типах обменов. Nature is a part of both exchange types.

[pupil]

sorry, did not notice that this is how it goes in the previous part of the sentence :-)) it is, practically, rewording

[Enote]

IMHO
These two chains of exchanges end/terminate in the Nature.

[gogolesque]

thanks to all!
i am going to say that they are connected to nature (it will go with the rest of the article i have better)

[kintorov]

I don't think that "close" is the appropriate word in your sentence.

I have the following sentence in English which is similar to yours.

...evolutionary economy has left to environmental influences to inscribe the exact characteristics of dangerous predators...

Also consider related/connected/focus on/concentrate on

[Turk]

both exchanges tie up with nature to form an "exchange triangle"...imho

[Turk]

eventually, or in the final reckoning, that is

[Aiduza]

...are BOTH ULTIMATELY connected to nature...

[10-4]

очень просто - they both come to the nature