This reduces overall emissions of carbon dioxide, the principal greenhouse gas, and enables greater economic autonomy for individuals and communities. (lactationmatters.org)
Adds Aronson: «We absolutely must control emissions of the principal greenhouse gas, carbon dioxide, if we are going to preserve life in the oceans in some approximation of the way it should be.» (scientificamerican.com)
We have performed such experiments for the principal greenhouse gases, clouds, and aerosols using the [Goddard Institute] climate model by systematically inserting, or taking out, each atmospheric constituent one at a time, and recording the corresponding radiative flux change. (dotearth.blogs.nytimes.com)