canals

I think the difference is that in the UK we have a heritage of building canals that can service as a utility.

My point is, root canals are much more invasive and have their own problems(not associated with dental fillings).

Places like Amsterdam weren't always cycling paradise, canals were getting paved for to make streets for cars.

Immigrants would never have been able to complete the canals that the slaves completed in the South.

So the reason canals were more successful in the North was not because the South had slavery.

Dams and canals aren't just subsides, they're system efficiency multipliers, much like the Interstate Highway system.

They took quite a bit of time to realize that canals were a stop gap technology.

Other than the anaesthetic, the materials used in root canals are are entirely different from those used in a dental filling.

It would have been a catastrophe to even attempt those canals with immigrants or natives.

Even in the face of geographic realities like this, slaves were still able to carve out numerous canals in the south.

A large amount of the damage coming from headphones comes from the fact that they increase the temperature of your ear canals.

Even if we could justify the immense energy usage, we can't drive existing pipes and canals in reverse.

Something similar is cities that have begun "daylighting" their rivers which were converted into little more than concrete drainage canals.

From the third paragraph: "Smoke evacuation canals designed to suck out smoke and replace it with fresh air failed to do either.

Canals that would have been highly unlikely to have been carved out by any rational means.