A hydrocarbon which is a greenhouse gas is:
Methane
Greenhouse gas is that has a property of absorbing the infrared radiation emitted from Earth's surface and reradiating it back to atmosphere.
Explanation for correct option D:
Methane () is a greenhouse gas and a hydrocarbon. Heavy forms have the potential to contaminate soil and groundwater. Because methane, the most widely stated hydrocarbon in this context, is a more effective heat-trapping greenhouse gas than , it contributes more to climate change when it leaks into the atmosphere unburned than the Carbon dioxide () created by burning it. Greenhouse gases are gases that cause global warming.
Explanation for incorrect options:
A) As an air contaminant, Acetylene () poses no risk to human health or the environment.
B) In the amounts observed in ripening rooms, Ethylene () has been determined to be neither harmful nor dangerous to humans. In fact, Ethylene () was used as an anesthetic in hospitals at doses far higher than those seen in a ripening room.
C) Ethane () is not listed as a dangerous substance. Its biggest danger is that it is extremely flammable.
Hence, the correct option is D) Methane ().