White smoke is a sign that the engine is burning coolant, which can be caused by a number of problems, including a blown head gasket, a cracked cylinder head, or a warped engine block. These problems can all lead to increased emissions of hydrocarbons and carbon monoxide, which are harmful pollutants that contribute to smog and climate change.
In addition to the environmental impact of white smoke, it can also be a sign of a serious engine problem that could lead to costly repairs. If you see white smoke coming from your muffler, it's important to have your car inspected by a qualified mechanic as soon as possible.
