What are biproduct of petrol?

Because petrol is volatile, some of it evaporates into the air and that's what you smell.

thats a tough one- maybe by a petrol truck.

When petrol runs out I hope we will be running electric cars powered from renewable sources. Solar and wind farms are producing electricity now which can power electric vehicles. Scientists and...

yes of course it does otherwise it won't work.

The hydrocarbon mixture that is used to power the internal combustion engine in cars. Americans call it gas or gasoline. When plants& animals got buried in sedimentary rocks under high...