252 karma · joined April 3, 2013
2% of global steel production 1% of global coal production 0.3% of global oil production
http://www.slate.com/articles/business/the_juice/2016/06/why...
To add some more concrete numbers, in 2015 there were 14,357 units completed in New York. Permits were issued for 56,528 units. (Only 20,000 permits were issued in 2014. They were down 65% in Q1 2016.)
For a city of over 8 million people, I would expect 50,000 units/year to be the sustainable level. 20,000/year seems quite low.
http://www.nycrgb.org/downloads/research/pdf_reports/16HSR.p...
With regards to a CD, the decibel measures the gain rather than the volume. 0dB in this context simply means "full volume", while -10dB means 10% of full volume, and -20dB means 1% of full volume.
It sounds like the lecturer did an effective job of convincing people how valuable agile can be.
Is continuous, gradual improvement the best way to fully autonomous cars? I don't know. But the author's argument is simply that we aren't there yet.