The opposite of an acid is a base, and that's exactly what an antacid is. Antacids make you feel better by increasing the pH balance in your stomach. The pH system is a scale for measuring the acidity or alkalinity of a given environment (in this case, your stomach). The scale goes from 0 to 14. A pH of 7 is neutral. Below 7 is acid. Above 7 is alkaline.
Economy is the large set of inter-related economic production and consumption activities which aid in determining how scarce resources are allocated.
Economics is the study of how society uses its limited resources. Economics is a social science that deals with the production, distribution, and consumption of goods and services. It focuses heavily on the four factors of production, which are land, labor, capital, and enterprise. Economics is often broken down into two fields of study - macroeconomics and microeconomics.