Emission controls won’t satisfy this law because this isn’t about particulates or nitrous oxides.
This is about CO2 and climate change. No matter how clean your exhaust is by putting it through filters or catalytic converters, if you burn carbon you make carbon dioxide.
You haven’t read the actual law I see. No where in the actual text of the law is COm even mentioned what is defined is NOx and VOCs
Take the time to read and comprehend what actually was signed into law not political hyperventilating that so many just can’t help themselves from. Go ahead do a text search CO2 nor global warming nor climate change is in the bill not a single word of it. But hey don’t let the actual law get in the way of a good tissy fit.
https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202120220AB1346
Here is the sections on pollution.
THE PEOPLE OF THE STATE OF CALIFORNIA DO ENACT AS FOLLOWS:
SECTION 1. (a) The Legislature finds and declares all of the following:
(1) Small off-road engines (SORE), which are used primarily in lawn and garden equipment, emit high levels of air pollutants, including oxides of nitrogen (NOx), reactive organic gases (ROG), and particulate matter (PM). NOx and ROG together contribute to formation of ozone, a criteria pollutant with a national ambient air quality standard set by the United States Environmental Protection Agency (U.S. EPA) and a California ambient air quality standard and that has adverse impacts on health. Currently, California exceeds U.S. EPA and state standards for ozone in many areas, including the South Coast Air Basin, the San Francisco Bay area, and the County of Sacramento. NOx also contributes to formation of PM, which, along with directly emitted PM, has direct negative health impacts. PM also has an air quality standard set by the U.S. EPA and the state. Many areas in California also currently fail to meet PM standards, including the South Coast Air Basin and the San Joaquin Valley Air Basin.
(2) In 2020, California daily NOx and ROG emissions from SORE were higher than emissions from light-duty passenger cars. SORE emitted an average of 16.8 tons per day of NOx and 125 tons per day of ROG. Without further regulatory action, those emission levels are expected to increase with increasing numbers of SORE in California. Regulations of emissions from SORE have not been as stringent as regulations of other engines, and one hour of operation of a commercial leaf blower can emit as much ROG plus NOx as driving 1,100 miles in a new passenger vehicle
If they had actually put CO2 into the law which they didn’t you could always use biofuels such as ethanol or butanol or synthetic biogasoline made from tree trimmings like the Norwegians are doing. all of which would have a zero or even negative carbon dioxide emissions level. There is no reason a modern fuel injected ECU controlled engine of any size with full closed loop O2 sensor feedback cannot be programmed to hold the proper Air fuel ratio for any liquid or gaseous fuel. Be it octane,ethanol,butanol,methanol,methane,hydrogen,propane,butane,DME,acetone,ketones,furians the list of combustible liquids with the necessary antiknock indexes is long. Even longer for low compression small engines which run at 7:1 or less vs 11:1 for vehicles. Point is once you move into the 21st century from the late 18th century by going to computer controls with injection vs carburetors the fuels you can use open up widely.