Here is day 4 tip
Since today is actually Earth Day I thought I would encourage everyone to sign up for the Clean Air commitment for Maricopa County at the Clean Air Make More website. If you give them your email address and/or phone number you can recieve alerts about high pollution advisories. This will give you the chance to know how to best protect yourself and your families from days that may affect your breathing. If you do not live in Maricopa County I would encourage you to look for a similar service from your local environmental agency.