Though makers of artificial turf tout their product's eco-friendliness compared to grass, experts say it's hardly an open-and-shut case. Manufacturing the polymers and coatings for fake grass is energy intensive, and disposal issues must also be taken into account. According to a Canadian study, offsetting the carbons for a typical school athletic field covered in artificial turf would require planting and maintaining 1,861 trees for 10 years.

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