Questions with the keyword 'water'

• hi Richard, i was just wondering do you know how many Bactria cells you usually have to kill do get pure water? and how by JACK DA KING to Richard Comments: (No comments so far )
• @Richard how does light clean water? its very interesing by Liam to Richard Comments: (No comments so far )
• if you get it to work (pureafing water) would you donate it to poorer countrys or sell it to ritsher countrys by Dylan to Richard Comments: (No comments so far )
• How will water treatment help the growing population of the earth? by Lucy and 1 other. to Richard Comments: (No comments so far )
• What are you zapping water with? by Maximus Decimus Meridius Commander of ..... to Richard Comments: (No comments so far )