It's empty or fairly large, making the sounds from your hands bounce of the walls and therefore having it echo
Industry
Cars
Fuel burning
Use of chlorofluorocarbons
Answer:
The acidity level of water is measured by the pH scale. Pure water has a pH of 7, which is neutral. However, natural rainwater actually has a pH of 5.6 because it gets exposed to the gases in the atmosphere, making it a bit acidic. True acid rain will have a pH level measuring from 5.0-5.5.
Answer:
Liquid metal.
Tell me if wrong. :) Hope it helps!
Explanation:
They are all final consumers
