DENVER -- It feels like summer, and that means a few things. The temperatures are warmer, the sun is shining and ozone levels are increasing.

Starting June 1, summer ozone alerts will be issued on days when the area experiences unhealthy ground-level ozone concentrations.

There are many simple things to do to reduce auto emissions. You can take public transportation, ride your bike or even walk to work.

Changing how you care for your lawn is another option for reducing air pollution.

"Quart for quart, gas mowers produce 93 percent more emissions than electric mowers," said Sandi Garcia from the Regional Air Quality Council.

Electric lawn mowers are gaining popularity around the area.

"In the summertime everyone is mowing , so in your own neighborhood, if you can do this one thing, you really are helping the efforts," said Garcia.

The Regional Air Quality Council offers rebates to homeowners who switch to electric mowers. It's part of its "Mow Down Pollution" program.

Clean Air Lawn Care is a company that has taken electric mowing tools to the neighborhoods in Colorado.

"There's 800 million gallons of gas used on Americans' lawns this season," said Annie Carey of Clean Air Lawn Care.

The company has a mission.

"We want to reduce emissions nationwide associated with lawn care to zero," said Carey.

That's where grass master Luke Galli steps into the spotlight. He's an employee with Clean Air Lawn Care this summer. All of his equipment is electric and powered by solar panels on his pickup truck.

"This is pretty ideal; I get to work outside every day in the sun, and it's great. There are no gas fumes to breathe or anything like that," said Galli.

He constantly meets people who are interested in his company and especially his tools.

"As a battery dies, I plug it in. It's ready to use in an hour," said Galli. The side of his truck is where the battery chargers are connected to the solar panels.

This is the second season that Steve Zaiontz has hired Clean Air Lawn Care.

"It's my contribution to renewable energy. I feel better about it being cut with a renewable source," said Zaiontz from his Stapleton home.

Zaiontz said his bill is a few dollars more each mowing compared to other companies. "It's well worth it," said Zaiontz.

Clean Air Lawn Care composts lawn clippings and offsets the energy it does use through renewable energy broker, Juice Energy.

For more information on green lawns and ozone alerts, visit these Web sites:

Ozone Aware
Clean Air Lawn Care