Answer:
You should never throw an aerosol can onto a fire or leave it in direct sunlight – even if it is empty. This is because the pressure will build so up so much that the can will burst (and explode if there is a naked flame nearby). There are two reasons for the pressure going up:
the gas pressure increases
more of the liquefied propellant turns into a gas.
Let's look at these in more detail.
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Explanation:
Early settlers in Mesopotamia started to gather in small villages and towns. As they learned how to irrigate land and grow crops on large farms, the towns grew bigger. Eventually these towns became large cities. New inventions such as government and writing were formed to help keep order in the cities.
