One of the criticisms of the legal marijuana industry has been about the amount of energy required to power grow houses. But most agree that as cannabis becomes more mainstream, much of the growth will go back to nature, like the sustainable, organic operation outdoor cannabis farm, Pot Zero, in Eagle County.

Colorado Cannabis Tours is taking interested visitors up to farm throughout September so more people can learn how the owners, Rob and Linda Trotter, use their land and natural resources for a carbon free grow.

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