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Their findings showed that meat and other animal products are responsible for more than half of food-related greenhouse gas emissions, despite providing only a fifth of the calories we eat and drink.

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If you fly regularly, replacing flying with other forms of transport may have a bigger impact on your carbon footprint than changing your diet. A passenger's carbon footprint from a one-way flight from London to New York is just under half a tonne of greenhouse gases. Switching from a regular petrol vehicle to an electric car could save more than double that over a year.

The figures for greenhouse gas emissions are in kilograms of carbon dioxide equivalents (CO2eq). This is a unit that converts the impact of different kinds of greenhouse gases, like methane and nitrous oxide, to the equivalent amount of carbon dioxide.

'Those products generate more profit than the electronics that were purchased before,' Mr Hodara says.

'Our consumers are African, our sellers are African, our employees are African, we're creating hundreds of thousands of jobs on the continent,' he replies. 'We're opening a tech centre in Cairo, Egypt, we're going to have about 100 developers there and we're going to do more of that. Our mission is Africa.'

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