aerial view water treatment plant for purified water or environment conservation. - chlorine stock videos & royalty-free footage00:21
asian indian lifeguard pool testing kit being used in a swimming pool for water chlorine and ph level - chlorine stock videos & royalty-free footage00:34
an underwater robot pool cleaner in operation at the bottom of a private pool in summer. the sunshine ripples of the water surface as the robot cleans below. - chlorine stock videos & royalty-free footage00:24
problems of conservation: water - part 26 of 28. focusing on some of southern california's problems, the film shows innovative ways to increase water supplies - percolation ponds, desalination of salt water, artificial weather control. this film also poin - chlorine stock videos & royalty-free footage00:30
explaining matter: chemical change - part 7 of 18. illustrates that a chemical change takes place when atoms from the molecules of two or more materials join to form molecules of entirely different materials. examples of changes include burning, digestion - chlorine stock videos & royalty-free footage00:32
aerial view water treatment plant for environment conservation. - chlorine stock videos & royalty-free footage00:14
housekeeping throwing chlorine tablets in swimming pool. - chlorine stock videos & royalty-free footage00:07