Next to the big tank, a computer monitor charts CO2 levels and a tube on one side separates the environment within the greenhouse from the outside world. (scientificamerican.com)
This study was of particular importance because it examined the factor of separate environments. (personalityresearch.org)
We preferred the Techno Source Kurio 7's method of parental controls, which let you set up a completely separate environment for several different children. (laptopmag.com)