Root cellars, complete with ladders or steps and the ability to walk about in the space, were first used: O In Australia
O in Britain
O In the United States
O In South America

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

the areas around the equator