Meaning of AFFECT in English
BAD : The programme is about computers and their affects on our lives.
GOOD : The programme is about computers and their effect on our lives.
To affect something (verb) is to have an effect on it (noun): 'Smoking affects your health.' (= smoking has an effect on your health)
BAD : This problem has also affected on the automobile industry.
GOOD : This problem has also affected the automobile industry.
affect sb/sth (WITHOUT on ): 'Fortunately these new tax laws don't affect us.'
Compare: 'This problem has also had an effect on the automobile industry.'
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012