Question

list the advantages of using unleaded petrol as a fuel in automobiles?

Answer 1

unleaded petrol does not release harmful gases and
also it does'not spoil the engine or release any type of sparks or heat in the engine

where as the other one is dangerous and release's harmful gase's

Answer 2

⇒ Unleaded petrol does not release lead compounds from exhaust fumes into the atmosphere and it causes less pollution. It does not emit harmful gases into the environment. 

⇒ Unleaded petrol does not emit harmful compounds, it helps in preventing health diseases like bronchitis, asthma and lung diseases.