What gas produced from combustion of fossil fuels is causing global warming

What’s the scientific notation for the number 6,840,000,000

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space