MANY reports 1–5 indicate that plants in a closed system will reduce the concentration of carbon dioxide in the air to a minimum value between 50 and 100 p.p.m. Gabrielsen 2 postulates “there ...

Interdisciplinary Advanced Materials Laboratory (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piaui (UFPI), Teresina, PI 64049-550, Brazil ...

Though it's a cold, dead planet, Mars still has its own natural beauty about it. This image shows us something we'll never see on Earth. Mars has only a thin, tenuous atmosphere, and most of it ...

School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, People’s Republic of China ...