[DOC] [TLE] The History of Earth Day | Earth Day Network [PAR] Each year, Earth DayApril 22marks the anniversary of the birth of the ... the 
last Beatles album, and Simon & Garfunkel's Bridge Over Troubled Water. ... of 
the anti-war protest movement and putting environmental concerns on the front 
page. ... the first Earth Day had led to the creation of the United States 
Environmental... [DOC] [TLE] Earth Day - Wikipedia [PAR] Earth Day is an annual event, celebrated on April 22, on which day events ... [DOC] [TLE] Earth Day 2016: History of Earth Day [PAR] How the First Earth Day Came About ... Actually, the idea for Earth Day evolved 
over a period of seven years starting in 1962. ... discontent over the war in 
Vietnam...a national day of observance of environmental problems...is being 
planned for... [DOC] [TLE] Earth Day: Facts & History - Live Science [PAR] Apr 21, 2015 ... Earth Day is an annual event, observed on April 22, that celebrates the planet's ... 
The first Earth Day was in 1970. ... a national "teach-in" that focused on educating 
the public about the environment. ... deeply concerned over the deterioration of 
our environment and the mindless dissipation of our resources. [DOC] [TLE] Earth Day - Holidays - HISTORY.com [PAR] Founded in 1970 as a day of education about environmental issues, Earth Day is 
... It began as a national teach-in on the environment and was held on April 22 
to ... A highlight of the United Nations' Earth Day celebration in New York City is 
the ... The first Earth Day was effective at raising awareness about environmental
... [DOC] [TLE] Display Content Printable Version - Digital History [PAR] In 1872, Congress created Yellowstone, the first national park. ... celebration of 
the first "Earth Day" that underscored heightened public concern for the 
environment. On April 22, 1970, some 20 million Americans observed "Earth Day
" by ... Publicity over the dangers of "ozone depletion" led the United States and 
most other... [DOC] [TLE] Milestones in Environmental Protection - Infoplease [PAR] 1964, The Wilderness Preservation Act establishes the National Wilderness ... 
1970, On April 22 Earth has its first official birthday celebration in the United 
States. ... endangered species protection, and other environmentalist concerns. ... 
1995, On Earth Day, a student-led campaign delivers the Environmental Bill of 
Rights... [DOC] [TLE] Introduction: the Earth Day story and Gaylord Nelson [PAR] The first Earth Day, observed across the country on April 22, 1970, crystallized a 
... 1969 proposed a national teach-in on the environment to send a message to ... 
However, beyond Capitol Hill, Americans increasingly shared Nelson's concerns. 
... 2,000 colleges, and over 1,000 communities  took action on April 22, 1970. [DOC] [TLE] [Regents Prep U.S. History] Environment: History [PAR] A resurgence of attention and concern over the environment and management of 
resources ... April 22, 1970 was designated the first "Earth Day" celebration. [DOC] [TLE] Earth Day: Facts and Significance - Conserve Energy Future [PAR] On this day various national and international activities are conducted to 
understand ... in more than 192 countries to raise the environmental concerns 
and diversify and mobilize ... The earth day movement last from a day to over 
couple of weeks where ... in the first Earth Day of United States that took place on 
22 April 1970. [DOC] [TLE] April 22, 2016 | Tech Today | Michigan Tech [PAR] Apr 22, 2016 ... Michigan Tech and the Keweenaw Celebrate Earth Day ... politically, regarding 
their growing concerns over air and water pollution. He called first for a national 
environmental teach-in, which eventually led to national ... Today, Earth Day is 
an international observance with more than 192 countries working... [DOC] [TLE] Earth Day facts, information, pictures | Encyclopedia.com articles ... [PAR] An estimated twenty million Americans took part in the first Earth Day on April 22, 
1970. ... of environmental problems, he called for a teach-in on the environment 
at ... Senator Nelson repeated variations of this speech over the

Question: Concerns over the environment led to the first national observance of this day on April 22
Answer: Earth Day