This is CBSI in the world. I'm John Batchel with Professor Peter Frankapan.

The Earth Transformed and untold history. This has to do with natural resources and exploitation.

We no longer cut down huge forests, well, not on purpose. But I learned from Peter's reporting that one

cotton shirt requires 2,700 liters of fresh water. I'm stunned, Peter. Is that a factor in the

cotton industry? I know they've done a lot of work about blood cotton, but the use of water seems

reckless. Is there comment on this generally?

Yeah, I mean, that amount of water, just under 3,000 litres of fresh water is the equivalent

of a person's drinking needs for two and a half years. A pair of jeans, it's about three times

that amount. The global fashion industry produces around about

10% of all greenhouse gas emissions averaged out. And some projections put it that in the next

20 years, that's going to treble. So I think that my job as an educator and as a professor

is to give people more knowledge than perhaps they had beforehand

and to let them make their own decisions about how they use that. But I hadn't realized the level

of waste, for example, around food. So we waste globally around 930 million tons of perfectly

edible food that if you put that all in 40-ton trucks,

would stretch around the world seven times around, 231 million trucks.

So there are all sorts, sorry, 23 million trucks, would stretch around the world seven times round.

So the wastage that we go through, because the way we make things, the way we

discard things, the way we throw things away, looks to me totally unsustainable. And of course,

we individually, we're quite good, I think. No one really opens the window of their car

and chucks trash out onto the sidewalk. No one, no one deliberately throws food away from their

fridge because they can't be

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