A piece claims world population will fall in the next 50 years.
It's been claimed that world population will fall within 50 years.
It's been claimed that world population will never fall.
The differences between the two scenarios are studied.
I heard about that in the past but haven't heard much about it now.
They are traveling by foot down the street tonight.
Ceramics and wood-turning are highly disliked crafts and basically never done.
There are at least two types of studies used.
Three years ago, Bayliss came out here.