Why do countries give importance for the development of non-conventional energy sources ?

Non Conventional Energy sources: Those energy sources which are renewable and ecologically safe. such as solar energy, wind energy, biomass energy, ocean energy (tidal energy, wave energy, ocean thermal energy), geothermal energy, nuclear energy etc.

Serious environmental problems are caused by increasing use of fossil fuels. Hence, the need to use renewable energy sources like solar energy, wind, tide, biomass andenergy from waste material, has shown its importance.

When two tectonic plates collide and one or both push upwards they also push up the crust,a mountain will for so that will be your answer. hoped this

Answer a mineral that contains a combination of silicon, si, and oxygen, o, is a silicate mineral. hope it ^.^