What would happen if we used up all the coal on Earth?

it will be very difficult for us to transport because most vehicles depends on petroleum, Transport on Earth will became complicated, and if coal will get exhausted we will lose an unique fossil fuel. Coal is used in various domestic and industrial purposes.

well there will be no oil making everyone to have to walk and no more cars or air plains meaning you won't see people from different country.

Explanation:

the deaths of over a million communist soldiers

post-traumatic stress disorder in veterans

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.