The car/bus comparison is useful, the others aren't because they travel at different speeds.
Probably walking can still move more people than cars. If walking is 5 kph and driving is 50, people need to take 10x less space to break even. They probably do, as cars need to keep distance.
I think it is funny to make this an ethics discussion when there is plenty of evidence that bacon and sausage cause digestive tract cancers. Meat is also pretty expensive unless heavily subsidized.
I think the main focus should be on educating people that a healthy diet contains a very small amount of meat even though the meat industry has managed to make people think it should be in every meal.
While researching another issue, I found some evidence that a vegan diet can be better than the average meat diet. This could be because the meat in pet food is of poor quality and is more likely to be spoiled than plants.
You could of course grow mice or purchase expensive meats but once it is well-rearched, a vegan diet may be a more economical way to provide a good nutrient profile.
There is but most people prefer to pretend they understand rather than seek a scientific understanding.
I would say the only thing the movie has in common with the book is that it mentions the book's main character and the laws of robotics. The book is all about weird behavior of robots that actually obey the laws but the movie just treats them as some corporate doublespeak.
it is better than the competition but it will never be like Google before 2019 because they'll never build their own index.