Here are some ideas for earning the Air badge. Some activities are designed to be done in a patrol or unit, others are designed to be done at home.
Suggestions have been split into ideas for Guides aged under 10 and Guides aged over 10, but feel free to mix and match - as long as it is a challenge for the individual girl!
With your patrol or unit, make paper aeroplanes and see whose flies the furthest. Here are some instructions.
Make a poster showing different activities that contribute to air pollution. There is some information here.