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Nowadays the most importaint problem is ecology. Every day people cut big areas of tropical forests.
Sientists say ,that in a hundred years on earth will remain only a small part of the current stock of wood. If everyone think about this problem, we would save our forests
Sientists say ,that in a hundred years on earth will remain only a small part of the current stock of wood. If everyone think about this problem, we would save our forests
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