Ozone
Subtitle: the earth's sunscreen
By: Daniel Brassard, Science and Technology Division.
Contributors: Brassard, Daniel J. 1953-; Canada. Library of Parliament. Science and Technology Division.
Series: Background paper -- BP-293E; Background paper (Canada. Library of Parliament. Research Branch) -- BP-293E.
Publisher: Library of Parliament, Research Branch
Published: 1992
Place of publication: [Ottawa]
Language: eng
Number of pages: 22
Subjects: Ozone layer; Ozone layer depletion -- Government policy -- Canada
Other titles: The earth's sunscreen : ozone.
Notes: Cover title.

"April 1992".