Matches in DBpedia 2014 for { ?s ?p <http://dbpedia.org/resource/Category:1973_in_the_environment> . }
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- 1973_in_the_environment subject Category:1973_in_the_environment.
- Agreement_on_the_Conservation_of_Polar_Bears subject Category:1973_in_the_environment.
- Endangered_Species_Act subject Category:1973_in_the_environment.
- Oil_Pollution_Act_of_1973 subject Category:1973_in_the_environment.
- Snail_darter_controversy subject Category:1973_in_the_environment.
- Category:Protected_areas_established_in_1973 broader Category:1973_in_the_environment.