Answers are:
1) releases carbon dioxide when burned.
2) releases fewer toxins than coal.
3) forms from organic remains.
Natural gas is a fossil fuel formed from the remains of plants and animals.
Natural gas is usualy methane, it is not renewable recourse.
Balanced chemical reaction of methane combustion:
CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g) ΔH = -802.3 kJ.
