Oklahoma environmental experts have issued a warning as more people spend the summer outside. The air quality isn't great some days because of heat or summer fires."Today is actually a really good air quality day," Erin Hatfield, with the Oklahoma Department of Environmental Quality, said Monday.Many factors, such as the weather or wildfires, can impact the air quality, and the Oklahoma DEQ closely monitors it."We have a team of meteorologists and forecasters here within the agency that looks into all the things that are going on, take into account real-time issues," Hatfield said.Ozone alerts and air quality health advisories can warn you if there are unhealthy levels in the air, especially for sensitive groups."You can go to our website ... and sign up, and you can get either text messages or emails that will let you know when there is an air quality health advisory," Hatfield said.There also are steps you can take to keep Oklahoma's air quality in the good category."Carpooling, maybe if you can ride a bike to work or walk, mow later in the day or very early in the morning and also fill up your gas tank early in the morning or late at night," Hatfield said.You also can limit the amount of time in your car or try to work from home when you can."Those little things, if we all do them, they really add up and can make a big difference," Hatfield said.