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An experienced carpenter applies impregnation to a wooden board in the workshop, demonstrating the skill and skills of working with wood.
Rally, group of people gather in the city for a demonstration, stock photo
Medium long shot of mature teacher of Environmental Education demonstrating wind turbine model to his students during class
Vertical. girl with her fist in the air in a demonstration. Group of people at manifestation climate change and global warming pollution and factories, environmentalists involved in the fight against
Group of people with placards and poster on global strike for climate change. Global warming and environment concept.

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