Jefferies, Lawrence. Air, air, air / [electronic resource] / by Lawrence Jefferies ; illustrated by Lewis Johnson.. — Mahwah, N.J. : : Troll Associates,, c1983.. — 32 p. : : col. ill. ; 26 cm. - The Question and answer book.
Анотація: Answers such questions as "What is air made of?" and "How do plants use carbon dioxide?". Includes simple experiments.