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Energy sources

Across
Energy sources derived from the partly decayed bodies of animals and plants are called _______ fuels.
Energy produced from the sun.
A type of trash that rots in a landfill and releases a gas that can be converted to a fuel source.
Wind turbines can convert the energy of the _____ into mechanical energy.
A solid fossil fuel.
Down
A fossil fuel that is a mixture of gases beneath earths surface is natural _______.
When the current supply of _________ resources is exhausted, there will be no replacement supplies available.
The form of biomass that once provided all the energy needed for heating homes and cooking food.
A energy source used to provide nuclear power.
Hydroelectric plants convert energy from falling ______ into electricity for home use.
A liquid fossil fuel.