"It is a noble cause. When I return, I will get to know what is needed to be done and will act accordingly," Ganguly told a TV channel over the phone from Australia, a day ahead of the Boxing Day Test.
"India is a large country and problems are there because of the big population. Hygiene is important," Ganguly said.
However, the cricket legend quashed rumours of foraying into politics. "I have said earlier also that I am not interested in politics."
Modi Thursday nominated more people to the Clean India Mission, including former Indian police service officer Kiran Bedi, Ganguly, danseuse Sonal Mansingh and the famous 'dabbawalas' of Mumbai.
Nagaland Governor P.B. Acharya, comedian Kapil Sharma, Eenadu group, Arun Puri and his India Today Group, and Indian Institute of Chart