'Photovoltaic' cells are also termed as

Food waste can be burnt to release

Any substance which is being burnt to release energy is called

The 'SI' unit for energy is

Green plants provide food for other

Tiny organisms which lived in seas and oceans are called

Although solar energy is safe, free of pollution and freely available but it is difficult to

Plankton (marine micro-organism), buried under heat and pressure for a long period, turned in to

The heat obtained from solar furnace is used to drive

An alcohol which is produced from sugarcane, corn and other plants by fermentation is called

Due to constant heat and pressure, buried plants turn in to

Living things are source of

Atomic number of 'Zinc' is

The need and demand of fossils fuel can be reduced by

Toxic air pollutants like sulphur dioxide and nitrogen oxides are produced by burning

'Fossils fuel' is regarded as an energy resource which is

Rubbish is buried underground to produce

The energy of running water is exploited to run turbines in

Types of fuel include

In non luminous flame, the air holes in Bunsen burner are