One of the most striking patterns in the aftermath of many urban fires is how much unburned green vegetation remains amid the wreckage of burned neighborhoods.

In some cases, a row of shrubs may be all that separates a surviving house from one that burned just a few feet away.

As scientists who study how vegetation ignites and burns , we aren’t surprised by these images: We recognize that well-maintained plants and trees can help protect homes from wind-blown embers and slow the spread of fire in some cases. So we are concerned about new wildfire protection regulations being developed by California that would prohibit almost all plants and other combustible material within 5 feet of homes, an area known as “Zone 0.”

Wildfire safety guidelines have long encouraged hom

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