When we think of inputs, we generally think about raw materials and the utilities such as energy and water, but we should also include the components of what we do and make.

We tend to imagine that they just arrive at the front door or factory gate.

But of course they all come from somewhere.

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Look how much stuff is going up and down the motorways every day.

Much of it comes from very far afield.

Components:

• How many of your components, including the tools of your trade like computers, come from abroad?

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