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Hello, I'm James Reynolds.
Welcome to the documentary from the BBC World Service.
In BBC Conversations, we bring people together to share their experiences.
This time, meet the Preppers.
The war in Iran has pushed up the price of fuel with knock-on effects on the cost of food, energy and transport.
Some parts of the world are already experiencing shortages.
Governments are preparing for further disruption.
We 've all lived through the COVID pandemic and you do n't have to doom scroll for long to find other threats