3 ms·
A version of that for cars is common enough actually. Several countries and US states have road worthiness tests that include minimum (maximum?) emissions stand
by ploika 5y ago
A version of that for cars is common enough actually. Several countries and US states have road worthiness tests that include minimum (maximum?) emissions standards that must be met. The car I drive will probably ultimately fail on emissions as standards rise over the next few years.
- deepsun 5y agoWell, the curious fact is that small planes (Piston General Aviation, what is discussed here) emissions are comparable to cars. Cessna 172 (trainer plane, not known for efficiency) burns 32 l (8.5 lb) per hour at a cruising speed of 122 knots (140 mph, 226 kph). Assuming no wind, it gives mileage of 14 l / 100 km (16.5 miles per gallon). Taking into account that there are much less planes than cars, they emit 0.13% of all the CO2, emitted by transportation, comparing to 81% of motor vehicles (623 times less) [1]. So I would say their lead emissions are too low to bother (and mostly harm their owners who are close to the exhausts). Would be nicer, of course, to use unleaded, but not a big deal to lobby for legislations. [1] https://communicatescience.com/zoonomian/tag/cessna-172/ https://communicatescience.com/zoonomian/tag/cessna-172/
- topkai22 5y agoI live in a county with emissions standards. Vehicles over 25 years old are exempt. There are reasonable ways to implement rising standards by exempting older ones.
- brewdad 5y agoI've lived in two places that required emissions testing. In both, the vehicles were held to the standard in place at the time it was built, not the current highest standard.