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.
The most commonly-used fuel today is hydrogen, but fuel cells can use almost any hydrocarbon including gas and alcohol. A constant supply of fuel and oxygen is required to sustain the reaction that produces the electricity. The idea of fuel cells is not a new one â the first examples were designed in the mid-1800s.