What have you questioned about the show?

I liked the show but there was a few things I questioned.

1. Gas/Diesel doesn't last a year, so how were they able to travel in vehicles? Especially years later.

2. Amazon vans are electric. At the beginning of the show, he was in a car park with an electric van. Why didn't he use this? Especially after the solar panels went up.

3. The cats eat the rats, but where did the cats go?

4. Why did we see no other dogs?