Until recently, I supplied friends and neighbors with Oak firewood from a never ending supply of storm toppled Oak trees at my California property. Lots of firewood in a big oak and it's one type of wood that will burn through the night with embers left in the morning.
Due to global warming concerns and as of today, particulate airborne emissions, wood burning is slowly becoming illegal in much of California.
New Fireplaces have already been outlawed for years and now wood stoves are targeted for conversion to gas with a bounty paid for each stove tuned in.
It's not unusual for the air district to enact 24 hour no burn nights to limit particulate exposure during the winter months. The Bay Area Air Quality Management District has 70 field inspectors and a special hot line where anyone can report a neighbor using a wood burning fireplace during a declared alert.
An inspector has to verify the smoke for a citation to be issued and the fine can be several thousand dollars for repeat offenders.
It's to the point where I can't even give away seasoned and split oak these days and the tree guys are sending all their stuff to the landfill if it's to big to be chipped.
Ag used to do burn piles to clear out the vineyards... now, it's just about all chipped. Although, soon the chippers will have to have new conforming tier 4 diesel motors to be legally operated