Ozone : protecting the invisible shield
Titre:
Ozone : protecting the invisible shield
Sommaire:
Explains what ozone is and how it shields us from the sun's harmful ultraviolet rays. Tells how damage to the ozone layer causes global warming, skin cancer, and cataracts. Describes events in the ozone crisis. Relates why CFC's became widely used chemicals, how chlorine atoms destroy ozone, and how we can prevent further damage to the ozone layer.
Description matérielle:
1 videocassette (25 min.) : sd., col. ; 3/4 in. ; VHS.
Terme de vedette-matière:
Informations de publication:
ACCESS Network