I'm a bit puzzled about what statistics you've been reading.
"Emitted solids," or particulates, only come into consideration with diesel engines, mostly because of the sulfur in their fuel. Gasoline engines don't release measurable solids in their exhaust, and the three controlled pollutants (HC, hydrocarbons, unburned fuel; CO, carbon monoxide, incompletely burned fuel and air; and NOx, the family of nitrous oxides, chemically changed nitrogen in the air) are all gaseous.
Besides, it's widely known that trucks (per DOT classification) conform to emissions regulations that are less stringent than passenger cars.
Carbon dioxide (I imagine that's the "phony" greenhouse gas you're referring to) is a direct result of combustion, and proportional to fuel consumption. The more gas you burn, the more carbon dioxide you create, to the tune of about sixteen pounds of it per gallon of gasoline. Unless your Suburban and GMC put together are somehow more fuel-efficient than the Honda, you're creating more carbon dioxide.
The greenhouse effect can't be dealt with too thorougly here, but it continues to surprise me that Americans as a whole are so willing to pretend that it doesn't exist, despite any amount of real evidence to the contrary.
Eliminating two-stroke weed eaters wouldn't be bad, and you wouldn't have to go to four-stroke motors, either. Use an electric one, or else remember that they still make hand-operated clippers.
And the only reason that manufacturers have to be regulated is because of people who are either too short-sighted, stupid, or self-centered to think about the consequences of actions, who don't want to provide the pressure on the industries themselves, and who don't realize just how severely "buying what [you] want" affects everyone else on an increasingly interconnected and messed-up planet.