What is the triangle icon with up and down arrows

The logo is usually displayed with the arrows circulating clockwise, but the underlying MР“В¶bius strip exists in two topologically distinct mirror-image forms of opposite handedness. Existing single half-twist variants of the logo do not generally agree on which of the arrows is the one to fold underneath. However, most variants of the symbol used today have all the arrows folding over themselves, producing a MР“В¶bius strip with three half-twists. Р”В«oth Anderson's proposal and CCA's designs form a MР“В¶bius strip with one half-twist by having two of the arrows fold over each other, and one fold under, thereby canceling out one of the other folds. Anderson's original proposal had the arrows form a triangle standing on its tip-upside down compared with the versions most commonly seen today-but the CCA, in adopting Anderson's design, rotated it 60Р’В° to stand on its base instead. Though use of the symbol is regulated by law in some countries, countless variants of it exist worldwide. As such, anyone may use or modify the recycling symbol, royalty-free. The Container Corporation of America originally applied for a trademark on the design, but the application was challenged, and the corporation decided to abandon the claim. The recycling symbol is in the public domain, and is not a trademark. However, the universal symbol may have been inspired by similar existing recycling symbols, such as one featuring two arrows chasing each other in a circle that Volkswagen stamped in the early 1960s into some automobile parts it remanufactured. The public-domain status of the symbol has been challenged, but this challenge was unsuccessful owing to the wide use of the symbol. The symbol is not trademarked and is in the public domain. It was won by Gary Anderson, then a 23-year-old college student at the University of Southern California, whose entry was the image now known as the universal recycling symbol.

Container Corporation of America, a large producer of recycled paperboard, sponsored a contest for art and design students at high schools and colleges across the country to raise awareness of environmental issues.

Worldwide attention to environmental issues led to the first Earth Day in 1970.

What is the triangle icon with up and down arrows