"speeding increases pollution"?

[boutons_deux]

I challenge that idea.

I contend that hybrids actually pollute more. modern internal combustion engines produce almost no emissions. but that is only after their catalytic converter heats up. With the hybrid turning on and off, the catalyst cooling between usage...

http://www.afdc.energy.gov/vehicles/..._emissions.php

[Wild Cobra]

http://www.afdc.energy.gov/vehicles/..._emissions.php

that says nothing about the starting/stopping cycle of the hybrid engine, and only addresses Co2 emissions. Not pollutants.

[DarrinS]

that says nothing about the starting/stopping cycle of the hybrid engine, and only addresses Co2 emissions. Not pollutants.

My gas engine doesn't start up much -- only when the battery gets low, e.g I've been driving several miles in heavy traffic with AC cranked. All I know is I get better mileage in city driving vs highway.

[boutons_deux]

that says nothing about the starting/stopping cycle of the hybrid engine, and only addresses Co2 emissions. Not pollutants.

I see, energy.gov excludes "normal stop/start" driving behavior in their auto pollution research, calculations, glad to know that detail

[Wild Cobra]

My gas engine doesn't start up much -- only when the battery gets low, e.g I've been driving several miles in heavy traffic with AC cranked. All I know is I get better mileage in city driving vs highway.

Yes, but if your engine starts and stops 5 times as often as a conventional car, and you use half the fuel, you are probably polluting twice as much as if you were using a conventional engine. Granted, CO2 emission are less, by unburned hydrocarbons, N2O, etc, are greater.

Emissions for hybrids don't include as many stars and stops as they really do.

[Wild Cobra]

I see, energy.gov excludes "normal stop/start" driving behavior in their auto pollution research, calculations, glad to know that detail

So why don't you link it?

And... do they consider normal, the same way the EPA claims cars mileage standards?

What a crock of ...

[DarrinS]

Yes, but if your engine starts and stops 5 times as often as a conventional car, and you use half the fuel, you are probably polluting twice as much as if you were using a conventional engine. Granted, CO2 emission are less, by unburned hydrocarbons, N2O, etc, are greater.

Emissions for hybrids don't include as many stars and stops as they really do.

Can you point me to relevant literature on this? I find it hard to believe.

[Wild Cobra]

I know I've seen articles specifically for cars. haven't found it yet, but how about this:

Manufacturers reported the hybrid dozers and excavators reduced fuel consumption and greenhouse gas emissions by 20 percent and cut smog-forming oxides of nitrogen emissions (NOx) by 30 percent. But, UC Riverside researchers found fuel savings of between 7 percent and 28 percent and NOx emission increases of up to 21 percent when compared to conventional diesel equipment.

http://ucrtoday.ucr.edu/18506

It doesn't completely apply to cars, because diesel is a dirty process to start with, and it says newer models aren't as polluting. Cars with modern emission controls simply don't have the hot/cold/hot/cold/hot/cold catalyst during a single trip, and therefore have less unburned hydrocarbons and less NoX.

[Wild Cobra]

Can you point me to relevant literature on this? I find it hard to believe.

I've been looking. Been some time since I've seen it, and google isn't friendly with past article and keyword searched. Simply TMI out there.

[Trainwreck2100]

I stand corrected. A non-existent engine designed like that would indeed be more efficient.

It's not non-existent run your car in third gear at 65 MPH should burn more than 5th gear and 75 MPH

[Winehole23]

global study fingers agriculture as the leading cause of mortality from pollution:

In the U.S. Northeast, all of Europe, Russia, Japan and South Korea, agriculture is the No. 1 cause of the soot and smog deaths, according to the study. Worldwide, agriculture is the No. 2 cause with 664,100 deaths, behind the more than 1 million deaths from in-home heating and cooking done with wood and other biofuels in developing world.


The problem with farms is ammonia from fertilizer and animal waste, Lelieveld said. That ammonia then combines with sulfates from coal-fired power plants and nitrates from car exhaust to form the soot particles that are the bigair pollution killers, he said. In London, for example, the pollution from traffic takes time to be converted into soot, and then it is mixed with ammonia and transported downwind to the next city, he said.


"We were very surprised, but in the end it makes sense," Lelieveld said. He said the scientists had assumed that traffic and power plants would be the biggest cause of deadly soot and smog.

http://www.weather.com/science/envir...ills-3-million

[boutons_deux]

global study fingers agriculture as the leading cause of mortality from pollution:

http://www.weather.com/science/envir...ills-3-million

Thanks, BigChem! Industrial, energy, agricultural chemicals poisoning the planet, and the people. Sort of a eugenics by BigCorp. Increasing and sustainable forever? Monsanto wants Agent Orange on farms.

[TeyshaBlue]

Big Ammonia!