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  2. 1971 - Wikipedia

    en.wikipedia.org/wiki/1971

    1971 was a common year starting on Friday of the Gregorian calendar, the 1971st year of the Common Era (CE) and Anno Domini (AD) designations, the 971st year of the 2nd millennium, the 71st year of the 20th century, and the 2nd year of the 1970s decade.

  3. Earth Day - Wikipedia

    en.wikipedia.org/wiki/Earth_Day

    The goal of Earth Day 2014 was to dramatically personalize the massive challenges surrounding global climate change and weave that into both Earth Day 2014 and the five-year countdown to Earth Day 2020, the 50th anniversary. It was an opportunity to unite people worldwide into a common cause and call for action. [110]

  4. Year Without a Summer - Wikipedia

    en.wikipedia.org/wiki/Year_Without_a_Summer

    1816 is known as the Year Without a Summer because of severe climate abnormalities that caused average global temperatures to decrease by 0.4–0.7 °C (0.7–1 °F). [1] Summer temperatures in Europe were the coldest of any on record between 1766 and 2000, [ 2 ] resulting in crop failures and major food shortages across the Northern Hemisphere .

  5. 1970s - Wikipedia

    en.wikipedia.org/wiki/1970s

    The Twenty-sixth Amendment to the United States Constitution was ratified on July 1, 1971, lowering the voting age for all federal and state elections from 21 years to 18 years. The primary impetus for this change was the fact that young men were being drafted to fight in the Vietnam War before they were old enough to vote. [33]

  6. List of years - Wikipedia

    en.wikipedia.org/wiki/List_of_years

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  7. Global cooling - Wikipedia

    en.wikipedia.org/wiki/Global_cooling

    An April 28, 1975, article in Newsweek magazine was titled "The Cooling World", [37] it pointed to "ominous signs that the Earth's weather patterns have begun to change" and pointed to "a drop of half a degree [Fahrenheit] in average ground temperatures in the Northern Hemisphere between 1945 and 1968." The article stated "The evidence in ...

  8. Year - Wikipedia

    en.wikipedia.org/wiki/Year

    A calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar.The Gregorian calendar, or modern calendar, presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars.

  9. 1971 in the United States - Wikipedia

    en.wikipedia.org/wiki/1971_in_the_United_States

    Apollo program: Apollo 14 returns to Earth after the third crewed Moon landing. Satchel Paige becomes the first Negro league player to become voted into the Baseball Hall of Fame. February 11 – The U.S., United Kingdom, and the USSR (along with others) sign the Seabed Treaty, outlawing nuclear weapons on the ocean floor. February 20