Howdy Numb, Yes there is, but it won't fit in most grow spaces, gas and coal power plants!LOL!!!. Like SoOrbudgal said "... it's everywhere it's in the air." especially with global warming going on! There are some fungal based CO2 generators available and I tried them several grows back, but there was no visible effect or benefit from them. Just keep a window open to allow fresh air into the grow space and You'll (and Your plants) will be OK.