Karl Benz builds a three-wheel automobile powered by a gasoline engine.
First Air Conditioner worls
America's first aluminum can recycling plants open in Chicago and Cleveland
Geothermal energy is tested succesfully
Hoover Dam opens
First nuclear power plant in the US
The all-aluminum can is introduced and a massive recycling and recovery system is implemented to recycle the used cans.
The polyethylene terephthalate plastic bottle is patented by chemist Nathaniel Wyeth which soon began to replace glass bottles. The recycling of the plastic soon followed.