Quirky Science - Episode 2 9

Cooling is essential today, but it began with icehouses and lake-cut ice. The 'ice industry' faded due to pollution. Air-conditioning was invented to control humidity, not temperature. Cold isn't created?it's moved. The first fridge was built to fight malaria, but early models leaked toxic gases. Even Einstein designed a safer version. Later, refrigerants harmed the environment. Now, scientists explore sound vibrations as a cleaner cooling method.