North & Central America

The Simpsons Legos

“The Simpsons” debuts

Since its debut, 640 episodes of The Simpsons have been broadcast. It is the longest-running American sitcom, and the longest-running American scripted primetime television series in terms of seasons and number of episodes.

03 ozone graphic

46 countries sign the Montreal Protocol in historic move to restore the ozone layer

The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion. It was agreed on 16 September 1987 and entered into force on 1 January 1989. The ozone treaty has since been ratified by 198 parties, making it the first universally ratified treaty in United Nations history.

Solar panels

The first utility-scale solar farm in the U.S. begins operation

The Atlantic Richfield Company (ARCO) pioneered utility-scale solar power generation in 1982. ARCO opened a 1.1 megawatt operation in Hesperia, California, the first industrial solar power plant in the country. The company later opened a larger, 5.2 MW solar power plant in Carrizo Plain, California. The plant in Carrizo Plain operated from 1983 to 1994 and had one of the largest photovoltaic arrays in the world.