The harnessing of the new energy

 With the increasing concern over hazardous environmental consequences caused by burn-ing fos.il fuel. fuel cells now win favor in Japan and the U. S. . Experts predict that fuel cellswill eventually replace nuclear plants in 20 to 30 years, supplying eiectricity to households. and they will be used in cars and in space stations, as the major engines. Researchers are working hard to reduce their volume and cost so that they can meet the requirements of future energy resources in practical use .

Making use of tides and waves to produce electricity is feasible and economical. Many idieas have been proposed. for example, building a dam at the mouth of a bay to trap water in the bay when tbe tide comes and tben when it ebbs, driving turbines with that water to genterate electricity. To make use of the kinetic energy of waves, a series of buoys Linked together in rows offshore absorb kihetic energy when the waves push them back and forth.This incessant movement can drive hydraulic mackines to generate electricity. 

Turning wind power into electricity is nothing new, today wind-powered electrogenerator are commercially available. your home can have one installed on the roof. The machine will keep the current in the best orientation. It is equipped with rechargeable batteriest where electricity can be stored for use when the wind lulls. So you can have a cheap andsteady electricity suppLy from that contraption. the sun provides inexhaustible energy for all creatures on earth. In fact, except for nular energy. all fuel from which we obtain energy today came and comes from the sun. scintists predict that modern society will mainly rely on eolar nnergy in various ways in the next century.