Arctic Sea Ice Hits Record Low Winter Maximum, Points To Evidence Of Long-Term Climate Change

March 19, 2015 5:42 PM

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Arctic Sea Ice Hits Record Low Winter Maximum, Points To Evidence Of Long-Term Climate Change

A group of Clark College students attempted to dramatize air pollution by taking walks around Vancouver wearing gas masks as an Earth Week project, April 21, 1970. "We’re trying to show the effects of pollution, but most ignore us," said one of them, Ken Cochran.

An estimated 7,000 people jam a quadrangle at the Independence Mall in Philadelphia, during Earth Week activities celebrating the eve of Earth Day, April 22, 1970.

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