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Lesson: Chapter 15 — The biosphere

Footprints, waste and energy 2 of 6

Food miles

The distance a unit mass of a food travels from where it is produced to where it is eaten is called its food mile value. The food miles of a meal change with the amount of each food we eat and where it was produced.

For example, the food miles of some breakfasts for you, living in Kurunegala, can be worked out like this:

Meal 1

Food Food miles Source
Red rice 1 Rice from your own paddy
Potato curry 100 Potatoes from Welimada
Coconut 0 From trees in your garden
Eggs 10 From a local poultry farm
Total 111

Meal 2

Food Food miles Source
String hoppers of rice flour 85 Rice from Polonnaruwa
Dhal curry 925 Dhal from Mysore, India
Coconut 0 From trees in your garden
Coconut sambol 185 Chillies from Jaffna
Total 1195

Meal 3

Food Food miles Source
Bread 9340 Flour from American wheat
Fish curry 44 Fish from Negombo
Coconut 0 From trees in your garden
Coconut sambol 800 Chillies from Chennai, India
Total 10184

The shorter the food miles of our food, the more sustainable and environment-friendly it is. So we should work to shorten the food mile value of the food we eat.

Why distance matters

Every mile a food travels burns fuel in a ship, a lorry or a plane, adding to its carbon footprint; long journeys also need more packaging and refrigeration. Meal 3 is about ninety times meal 1, almost all because of imported wheat — and it is no more nourishing. Eating food grown nearby, in season, supports local farmers and keeps money in the country as well.

Shorter is greener

Food miles measure how far food travels to reach us; the shorter the distance, the more sustainable the meal.