With participation level at nearly a quarter of the population (22 percent), bowling rolled by such popular sports and activities as basketball (15 percent), golf (13 percent), aerobics (11.9 percent), baseball (13 percent) and yoga (9 percent) to secure the number one ranking.
Definition of FUEL CELL. : a device that continuously changes the chemical energy of a fuel (as hydrogen) and an oxidant directly into electrical energy.
A device that produces electricity by combining a fuel with oxygen. Fuel cells are used in space shuttles, where an electric current is produced by oxidizing hydrogen gas (the fuel) in an electrolyte cell.