A different way to measure the climate impact of food

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A different way to measure the climate impact of food
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The topic is serious. The index is bananas

can dramatically cut the carbon footprint of your diet. But what about the fewer calories, and lower levels of protein, found in most plant-based foods when compared with meat? That makes it hard to compare emissions of meals that are equally nutritious.proposes a banana index . It compares popular foodstuffs on three metrics—weight, calories and protein—indexed to the humble banana, a fruit of middling climate impact and nutritional value.

Poultry scores 11 bananas by weight and four by calorie. However, as a source of protein, it is more carbon-friendly than bananas: poultry protein emits just three-fifths of the same amount of banana protein. The same applies to salmon. Unsurprisingly, plant-based alternatives to meat do even better: a meat-free burger, for instance, scores just one-fifth of the emissions of bananas per gram of protein.

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