Burning vs. Chipping Our Green Waste

February 14, 2004

By
Jiordana Stark


What should we do with our backyard green waste?  For years, and for the majority of county residents, it has been either thrown out with the trash or burned.  What exactly is green waste?  It is plant and tree trimmings and weeds.

Why the big to-do about it now?  At the end of the 2003 fire season, backyard burning of any kind was generally outlawed by the Air Pollution Control District (APCD).  It is still allowed on designated ‘burn days’, only with an APCD burn permit, and on lots ¾ acre or larger.  But, why burn at all, no matter what the size of our backyards?  Emissions created from green waste burning contribute to poor air quality and contain cancer causing substances.  Children, seniors, and those with compromised respiratory systems may be particularly affected.

Let’s take a look at the pros and cons of burning verses the various alternatives.  While burning may seem inexpensive, hidden costs exist in both health and air quality.

On the other hand, most areas of the county now offer green waste pickup curbside on regular trash days, and containers may be provided (Contact your local sanitary service for more info.)  Community green waste drop-off sites are located throughout the county from which green waste materials are subsequently chipped or composted. 

Free green waste chipping events are held throughout the county that are a successful way to eliminate green waste, reduce fire hazards and prevent unwanted air pollution.  Or, best of all, if you are a little more ambitious and want to keep your green waste, chippers can be rented or hired at reasonable rates.  Share the costs with a neighbor or two and turn your green waste into gold.  Chipped trimmings recycled into your gardens as mulch can immeasurably benefit the soil.  Chipped material spread three to four inches thick over the soil acts as a weed inhibitor.  As the chipped material decomposes and becomes incorporated into the soil, the soil becomes richer and easier to work.

Even larger commercial agricultural operations have begun to chip what they used to burn.  Research shows that chipped prunings left in the orchard break down in the soil, create a healthy soil micro-environment, add nutrients, and improve soil tilth.

So, the next time you approach your green waste pile, match in hand, think about what your garden will be missing.  Maybe there is a good reason why your match won’t light.

University of California Cooperative Extension Master Gardener Volunteers can provide additional gardening information upon request.  Call the San Luis Obispo office at 781-5939 on Mondays and Thursdays from 1 to 5 PM, the Arroyo Grande office at 473-7190 on Wednesdays from 9 AM to 1 PM, or the Paso Robles office at 237-3100 on Wednesdays from 9 AM to Noon.  The San Luis Obispo Master Gardener website is at http://groups.ucanr.org/slomg/.  Questions can be e-mailed to mgsanluisobispo@ucdavis.edu.