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  2. Greenhouse gas - Wikipedia

    en.wikipedia.org/wiki/Greenhouse_gas

    For example, methane has a GWP over 20 years (GWP-20) of 81.2 meaning that, for example, a leak of a tonne of methane is equivalent to emitting 81.2 tonnes of carbon dioxide measured over 20 years. As methane has a much shorter atmospheric lifetime than carbon dioxide, its GWP is much less over longer time periods, with a GWP-100 of 27.9 and a ...

  3. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    t. e. The number π ( / paɪ /; spelled out as " pi ") is a mathematical constant that is the ratio of a circle 's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics.

  4. 2020 United States presidential election - Wikipedia

    en.wikipedia.org/wiki/2020_United_States...

    The 2020 United States presidential election was the 59th quadrennial presidential election, held on Tuesday, November 3, 2020. The Democratic ticket of former vice president Joe Biden and the junior U.S. senator from California Kamala Harris defeated the incumbent Republican president, Donald Trump, and vice president, Mike Pence.

  5. ESPN - Wikipedia

    en.wikipedia.org/wiki/ESPN

    ESPN (an abbreviation of its original name, the Entertainment and Sports Programming Network [2]) is an American international basic cable sports channel owned by The Walt Disney Company (80% and operational control) and Hearst Communications (20%) through the joint venture ESPN Inc. The company was founded in 1979 by Bill Rasmussen, Scott ...

  6. Climate change - Wikipedia

    en.wikipedia.org/wiki/Climate_change

    Because the IPCC uses a 20-year average to define global temperature changes, a single year exceeding 1.5 °C does not break the limit. The IPCC expects the 20-year average global temperature to exceed +1.5 °C in the early 2030s.

  7. Fahrenheit - Wikipedia

    en.wikipedia.org/wiki/Fahrenheit

    x + 459.67 °Ra. The Fahrenheit scale ( / ˈfærənhaɪt, ˈfɑːr -/) is a temperature scale based on one proposed in 1724 by the European physicist Daniel Gabriel Fahrenheit (1686–1736). [1] It uses the degree Fahrenheit (symbol: °F) as the unit. Several accounts of how he originally defined his scale exist, but the original paper suggests ...