Ah, the Fourth of July. The grand American holiday where fireworks come standard and the 'ooohs, and aaaahs' compete with the scream of bottle rockets, crackling jumping jacks and whatever makes that big boom that gets the dogs barking. Here's a few things you can think about to green up your patriotism.

While the number of display fireworks has declined by half since 2000, and make up about 10% of the total amount of fireworks used by Americans each year, these big bursts of color that light up the night aren't without their environmental impacts. The gun powder used to propel the fireworks, and accelerants and heavy metals used to color them can linger in the air and water for days. Fine particulate matter produced during the blast also adds to air quality concerns (all major displays must abide by local fireworks laws and the Clean Air Act.) Disney pioneered a technology in 2004 that propels fireworks using compressed air, and non-heavy metal colorants are available. These alternative technologies are available and are approved by the American Pyrotechnic Association, but are not widely practiced.

Does this mean you shouldn't watch fireworks? Of course not. But, if you're going to check out a big display, see if there is a public transportation option available. Some locations may offer shuttle service from a parking lot to a designated viewing area. Or you can gather up a group of family or friends, meet up at a central location and carpool. That way there's also less cars to fight traffic with when everyone is leaving after the show.

You could always stay home and watch the display on TV (with the lights off). Firework displays from around the U.S. are usually boradcast with patriotic music accompaniment, and this year will more than likely be shown in HD.

If you plan on purchasing and setting off your own fireworks be safe, and sweep up as much of the firework litter from the streets as possible (drivers the next morning will thank you.)

Amy says: I'll admit, I'm a sucker when it comes to grand firework displays. Although, when I was growing up my family went down the street and watched the neighborhood kids set off fireworks they got from the Native American reservations. That was fun until one of those ground-spinning fireworks took flight and buzzed by my head. These days, I stick to sparklers and enjoy the big public displays.

Tree Hugger (The Prettiest Pollutants)

About.com (Declare Your Independence from Toxic Firework Pollution)

American Pyrotechnic Association