Alice and Finn talk about a population explosion in the world - and how engineers suggest it can be dealt with.
This week's question:
How many zeros are there after the 1 in a billion?
Listen out for the answer at the end of the programme!
End of Section
the total number of people living in a particular country or region
a thousand million (in some parts of the world a million million)
- it's estimated
experts have made approximate calculations of how much something is likely to be or cost
an expected outcome
here, a large, sudden increase
- defining challenge
a difficult or demanding task that will shape or characterise related events
- technological solution
the use of technology to solve a problem or find an answer
keeping something at a constant, cold temperature
moving things or people from one place to another
to have made something become as best as it can be
here, eating or drinking something