what does meaning of this idiom? (step away from our screens)
While most of us don’t need science to tell us that nature is healing, perhaps it can nudge us to step away from our screens and spend more time outdoors.

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It is not an idiom! It is a simple instruction to move away from our TV's, computer monitors and other similar items.

Best wishes

Bob

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To me, it means to get away from your computer (something you do inside) and do more activities outside.

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"to step away from" comes from a film and normally refers to the instruction from a man with the gun (or your boss) to "step away from your guns" or work.  So you are "stepping out of your comfort zone".

"Nudge" is also way of guiding people rather than giving instructions.  So this sentence mixes something that is "guiding" replacing something that is "instructional" and links up to the spirit of the age.

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