Three key facts we like from The Immune System and Foreign Invaders: 1  White blood cells known as leukocytes make up the immune system portion of the blood. 2  Leukocytes are divided into three main groups that help protect our bodies: granulocytes, lymphocytes, and monocytes.
The average price people in the U.S. pay for electricity is about 12 cents per kilowatt-hour. (Context: A typical U.S. household uses about 908 kWh a month of electricity.). But there's huge variation from state to state. Here's a map of residential electricity prices, according to the Energy Information Administration. People in Hawaii pay the most for electricity, about 33 cents per kWh. A Hawaiian household whose electricity use was around the national average would have a monthly electric bill over $300.
For electricity, average prices per kilowatt-hour (kWh) and per 500 kWh are published. For utility (piped) gas, average prices per therm, per 40 therms, and per 100 therms are published.os Angeles area households paid an average of 20.5 cents per kilowatt hour (kWh) of electricity in August 2015, down from 21.5 cents per kWh in August 2014.