Combustion engines, the engines in gas-powered cars, only use a quarter of the fuel’s potential energy while the rest is lost ...

An curved arrow pointing right. THERMO-X is an Australian company which makes heat-reactive paint. In this video, the paint is applied to the exhaust pipes of a Harley Davidson. When the engine is ...

Soot from the chimney can leave dark, unpleasant-smelling stains ... exhaust gases being too low in temperature, which often occurs in tall chimneys or with modern furnaces that have low heat ...