Because when humans have a great need for these things, we use it faster than it can be produced. These resources take tons of years to recreate so if we keep using them at the really fast pace we are, they'll run out.
Coal, petroleum and natural gas took millions of years to form. Which is why they are classed as non-renewable resources.
Petroleum is one of Cameroons natural resources because there is an abundance of it.
Petroleum is one of Mexico natural resources but not the most important
Coal, petroleum and natural gas took millions of years to form. Which is why they are classed as non-renewable resources.
petroleum and Natural Gas
Petroleum Oil
petroleum, fish, shrimp, natural gas
Oil, natural gas and petroleum
yes
coal,petroleum products
petroleum, hydropower, and other resources of commercial importance.

Some Natural Resources in Sicily are: Petroleum fields, mining, natural fruits that grow there, and wheat.