Modifies a noun

• pool: Swimming Pool Our superb 12 meter indoor pool is the main focus of the Health Club.

• arena: In the indoor arena some of the best teams in the country will be competing for ultimate glory!

• rowing: What does the family think about your indoor rowing?

• championship: Nicola Simpson from Oxford Archers won Individual Bronze at the European Indoor Archery Championships in Ankara, Turkey on March 18.

• tennis: There is an outdoor children's play area and indoor table tennis and pool tables.

• pollution: Most of my ideas came from the website of the U.S. EPA on indoor air pollution.