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Global crisis
A speleologist man exploring a huge hidden cave hanging on a rope for safety and preparing to go down into the cave
track-type loader excavator machine doing earthmoving work at sand quarry
Installing paver bricks on patio, mallet to level the stones
Top down view of mysterious ice patterns. Unique Arctic phenomenon. Abstract designs and shapes. Ice texture from a bird's eye view. Photo wallpaper. Climate change, global warming. Beauty of earth.

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