1) Example for non renewable energy sources a) wind b) hydroelectric c) natural gas d) bioenergy 2) Disadvantage of non renewable energy a) Exhaust gases emit contamination gases in the atmosphere which are harmful for the environment b)  Non Renewable Energy Devices Need Recycling. c) their initial cost is high and sometimes unaffordable d) Limited storage capabilities 3) Why do we use uranium? a) to produce coil b) to produce oil c) to produce nuclear energy  d) to produce natural gas 4) When coal is burn it produces a) oxygen b) heat c) blue flame d) nitrogen oxides

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