Draw a bar graph showing the reduction in typhoid fever in the US because of chlorination.
Explain the effect of chlorination.
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ᴛʀᴇᴀᴛɪɴɢ ᴡᴀᴛᴇʀ ᴠɪᴀ ᴄʜʟᴏʀɪɴᴀᴛɪᴏɴ ᴍᴀᴋᴇꜱ ɪᴛ ᴩᴏꜱꜱɪʙʟᴇ ᴛᴏ ᴇᴀꜱɪʟy ᴀɴᴅ ɪɴᴇxᴩᴇɴꜱɪᴠᴇʟy ᴇʟɪᴍɪɴᴀᴛᴇ ᴍᴏꜱᴛ ᴍɪᴄʀᴏʙᴇꜱ, ʙᴀᴄᴛᴇʀɪᴀ, ᴠɪʀᴜꜱᴇꜱ ᴀɴᴅ ɢᴇʀᴍꜱ ᴛʜᴀᴛ ᴄᴀᴜꜱᴇ ᴅɪꜱᴇᴀꜱᴇꜱ ꜱᴜᴄʜ ᴀꜱ ᴅyꜱᴇɴᴛᴇʀy, ᴛyᴩʜᴏɪᴅ ᴀɴᴅ ᴄʜᴏʟᴇʀᴀ.
ᴩʟᴢᴢ ᴍᴀʀᴋ ᴀꜱ ʙʀᴀɪɴʟɪᴇꜱᴛ ☑
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