See artikkel on trükitud:
https://www.eesti.ca/on-earth-day-a-timeline-of-environmental-treaties/article23442
On Earth Day: A Timeline of Environmental Treaties
22 Apr 2009 EWR Online
During the past half century, we learned we share a fragile biosphere. Our view of life on Earth, whether through a microscope or from a space station, is colored by the knowledge that everyday human activities can threaten our future.

Read more here:
http://www.america.gov/multime...
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