CO[subscript 2] is a gas found in the air. It is also a nutrient essential for plant growth. Indoor and greenhouse gardeners can enrich the atmosphere with it and increase plant growth by up to 200%!
CO[subscript 2] should be used by every serious indoor gardener since it is easy to supply, inexpensive, non-combustible, safe to use and produces such astonishing results.
CO[subscript 2] Temperature & Humidity was written for the hobbyist. It is easy to understand, and describes exactly how to set up the system in your space.

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Founded in 2002, World of Books is a leading online destination for buying and selling both preloved and new books, committed to making sustainable reading accessible to all. With a mission to help people read more and waste less, World of Books offers a huge range of affordable, high-quality books ? giving both new and preloved titles a second life. The company also operates World of Books ? Sell Your Books, an easy-to-use platform that allows customers to trade in unwanted books for cash, helping to keep books in circulation while promoting sustainability. As a Certified B Corp, World of Books is driven by a vision to become the world?s largest and most sustainable dedicated online bookstore. The company measures its success through the positive environmental impact it creates, the value it provides to customers, and its ability to operate profitably while supporting its sustainable mission

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