Rich and Toggles:
I think we're mostly agreeing with each other, so I will only touch the points I want to make a bit more clear.
I am intentionally leaving the similarities on both dryer designs untouched. For example, both designs burn dust (which is clearly undesirable). Some electric designs (the ones that use an electric resistor that glows [nichrome wire, usually], as opposed to something like a long Calrod element) will also give off smells when there are VOCs around in the laundry room area. I was talking about the times when the utility (hopefully inadvertently) pumped gas with minute amounts of contaminants into people's homes -- neighbors with gas stoves were complaining too.
Anything that burns inside the dryer can (and often will) deposit on the fibers of the clothes and probably not just air out with the cool down -- that's what causes the yellowing or nasty smells on the clothes. I also used to think that people who claimed burning gas was a health hazard were a bit weird, but lately have been meeting a bunch of them (including non-smokers, non-tree huggers etc). A lot of them have asthma attacks when exposed, the ones that really surprised me were the ones with skin rashes.
I think that the "one unit of electric energy for every 3 units of gas" is a little out of touch. It was once true and it's true even for a very large amount of the population. But I would like to see people acknowledging (or even becoming aware) of the amount of losses one has pumping and transmitting gas -- there is an awful lot of leaking pipelines and the amount of energy to simply pump it (even if the pipelines are brand new and leak-free) is not nil. We can do better to make those losses lower for gas. But it's also true that the losses for generating electricity can be much, much lower -- the old-standby was to burn fuel, make steam and then run the electric generator. The power plants that are using turbofan engines (burn the fuel directly and the turbines run the generators) are doing much better -- enough so that if we're talking a gas stove, it's more efficient to burn the fuel and run an electric stove, even with electric transmission losses). We need to stop just repeating old phrases and push the industry to adopt more efficient and less polluting equipment -- and that goes for both electric and gas.
I will try and steer clear of the line about fabric softener (dryer sheets or liquid). We have all here read about how that is essential for many different types of laundry, including hospital laundry. I will agree that people using too much softener or in a wrong way can produce nasty results. Properly used, it has its places. I will not judge people experts or dumb based on the use or lack of use of something that when properly used has a good effect.
Rich: yes, I will strongly agree that line drying is the most efficient. Toggles: yes, I will also strongly agree that line drying is sometimes undesirable or even impossible. What I would like to see is getting people out of each other's throats -- I am against a ban on tumble dryers and I am also against a ban on electric dryers -- I will agree with the government giving people some sort of tax break for using a gas dryer, but not with banning them or surcharging. I'd hate for it to get to the point where a person with a kid that has allergic reactions to either a gas stove or clothes dried in a gas dryer to have to obtain special permissions just to come and put electric stoves or dryers in their home.
We've all seen how ludicrous it gets when a city prohibits garbage disposers (another dumb thing, from my perspective) and people you know come visit your town, take special pains to visit your hardware store and then, full of shame, try to hide it in the trunk as if they were smuggling nuclear weapons back home. This is supposed to be a free country, we're supposed to have at least some choice.
Cheers,
-- Paulo.
PS: I would also like to apologize for highjacking the thread, sorry.