Icons iPhone App

Esto es lo que buscaba un negocio en United States en su icon design

I'm looking for icons designed for an iPhone that reports air quality of your current location and any other location in US (plus a few other related features). It also allows you to post it a message to twitter about your location and the air quality. Some ideas for the icon is a person with cloud or puff of air in the background. But I'm open to any ideas. What ever your idea the icon must match Apple's requirements. The icon should not have transparent background. I do not want black background. I'm looking for icons in following sizes:
57X57
114X114
72X72
144X144
512X512
1024X1024

This will be offered free or at most for 99 cents on the app store hence the limited budget.

Thanks,
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