The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer.
answer
si unit will be kilogram kg
Of these choices i'd say that the third option or "domestic fuels are always cheaper to acquire and renewable". I hope this helps :)
<span>Ethnobotany is the study of a region's plants and their practical uses through the traditional knowledge of a local culture and people.</span>
