Mention any four renewable sources of energy.

Mention the non-renewable sources of energy.

What is renewable source of energy?

What is a non-renewable source of energy?

The example of non-renewable source of energy is

Mention any four fish by-products.

Petroleum is a fossil fuel and is a non renewable source. Which among the following indicates the proper utilisation of fuels ? a) Minimising the misuse of fuels. b) Stop using the utilisation of non -renewable sources. c) Developing alternate resources of fuels.

Mention any four reducing agents used to reduce oxide and halide ores. Give one equation for each.

Explain in brief about the alternate methods to be followed to prevent the harmful effects of over usage of pesticides. (OR) Mention any four effective methods of controlling pests, which are less harmful on environment based on biological principles.

Can you think of other sources of energy ?