In reading an article in the New Yorker entitled [Africa's Cold Rush and the Promise of Refrigeration](https://www.newyorker.com/magazine/2022/08/22/africas-cold-rush-and-the-promise-of-refrigeration), there were the following snippets:

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> if global food waste were a country its greenhouse-gas emissions would be the third largest in the world, right behind China and the US.
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Can someone specify the exact way that food waste generates so many greenhouse-gas emissions?

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> if every country were to have a cold chain similar to the ones the developed world relies on, these emissions would increase fivefold. Seen from that perspective, helping Rwanda develop an energy-efficient cold chain looks less like altruistic development aid and more like enlightened self-interest.
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Clearly, developed countries have technologies that use a lot of energy, and energy is currently usually produced with greenhouse-gas emissions. What does the author mean by "enlightened self-interest" in the snippet above? It is in the self-interest of the population of a poor underdeveloped country like Rwanda to have a food refrigeration chain as in a developed country. It seems the author is inferring that such developed countries providing aid to accomplish such a chain is less altruism and more self-interest. This doesn't seem to make sense though.