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.
The average price people in the U.S. pay for electricity is about 12 cents per kilowatt-hour. 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.