Air Conditoner + Dry Ice?

I was wondering, I saw this

http://www.instructables.com/id/DIY-Cheap-amp-Small-Air-conditioner/

Home made air conditioner but i was thinking instead of using regular ice could you use dry ice then the gas that comes off is CO2 and Im sure someone said something about CO2 injection is good for plants. Just a thought, let me know be like a 2 for 1.

The amount of C02 put off by dry ice is negligible. I would just go with normal ice.