PHOENIX (AP) - Environmental regulators have issued a ban on burning wood in metro Phoenix on Sunday.
The Arizona Department of Environmental Quality has issued a high pollution advisory for particulate matter.
Such advisories are issued when particulate matter levels are expected to exceed federal health standards for air quality.
No-burn restrictions are ordered when stagnant air and winter inversions trap pollution close to the ground.
Smoke and soot from wood-burning pose risks to people with asthma and other respiratory ailments.
The restrictions include bans on burning wood in fireplaces, outdoor fire pits and other patio products.
Gas and electric heaters are allowed.
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