Fossil fuel exporters

Petroleum, natural gas, and coal are exported from various source countries to countries reliant on these fossil fuels.
Petroleum.
Saudi Arabia is the largest exporter of crude petroleum in the world.
This is a list of countries by crude oil exports mostly based on The World Factbook:
Natural gas.
This is a list of countries by natural gas exports mostly based on The World Factbook:
Coal.
This is a list of countries by coal exports mostly based on US Energy Information Administration: