Your maths is a little off there: 100m is 5%

Scotland: autumn 11 months of the year, taps aff at 15° and fatal heatwave at 20°

That's true, although the long scale billion hasn't been a thing even in Britain for decades.

If it's fun facts you like, try this: English is the clear odd one out, most other languages use milliard for 10^9 and billion for 10^12.

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