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(Source of information here)

As you can see, cheese has the third highest carbon footprint. Only beef and lamb have a higher footprint.

Several other sources (such as this) corroborate this.

Why is it so high? You would expect it to be due to the milk production, but milk itself it one of the lowest on the chart.

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+50

TL;DR

The chart is misleading since it compares carbon imprint by mass instead of a measure of how much a human needs to survive.

Argument

The chart you link contains false comparisons. They are comparing mass of foods against each other. However, you don't eat for mass, you eat for calories (or protein or nutriment, or whatever). A better comparison would be to multiply each 1 kg of food by the calories in that food.

I got my numbers from here, with data sourced from USDA. The numbers in my chart below are kilograms carbon per 1000 calories:

Lamb         20.85
Beef         13.78
Turkey        5.83
Broccoli      5.71
Tuna          5.26
Salmon        5.15
Cheese        4.47
Pork          4.45
Yogurt        3.49
Chicken       3.37
Milk          3.17
Eggs          3.06
Rice          2.08
Potatoes      1.46
Beans         1.40
Tomato        1.39
Tofu          1.38
Lentils       0.78
Peanut Butter 0.42
Nuts          0.39

I used the cooked option of each food when available. For the numbers with some options, I used whole milk, pinto beans, plain lowfat yogurt, almonds for the nuts, and part-skim mozarella cheese.

My first conclusion, is that Cheese doesn't have such a high footprint after all. It is just a little higher than Yogurt, which is just a little higher than Milk, which is about even with eggs. All the animal products dominate the top of the list.

My other conclusions are that this is kind of a garbage comparison anyways. Broccoli doesn't provide calories, but it has more vitamin K than everything else on the chart combined. The peanut butter and nuts are really calorie efficient, but so what? If you try to live on peanut butter instead of rice you'll die of heart disease because you are getting 70% of your calories from fat and three times the recommended saturated fat dosage.

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    I've awarded a bounty to this answer because you did the work to compute the interesting numbers AND gave a good hint how relevant it actually is. – mart Apr 5 '17 at 13:46
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    Interesting answer, and fully agree with your last comment. It is probably better to compare food on a diet level (the footprint of an assortment of foods supplying calories and all sorts of nutrients in a healthy range) rather than product-by-product. See e.g. wwf.org.uk/eatingfor2degrees, for research on dietary level. – BartDur Jan 16 '18 at 13:57
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1kg of cheese takes around 10kg of milk to produce (more for some cheeses - e.g. parmesan is around 1:16; less for softer cheeses). So the carbon footprint of cheese is going to be at least that factor higher than that for milk (there will be a little extra from any heat/energy input into the cheesemaking process but this will be small).

Sources:

http://www.cheeseboard.co.uk/facts

http://www.wipo.int/wipo_magazine/en/2011/01/article_0005.html

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    The difference between cheese mass and milk mass is water. You get teh same nutriment from 1 kg of cheese as 10 kg of milk. Comparing 1kg of cheese to 1 kg of milk is like comparing apples and orange gatorade. Not the same thing at all. – kingledion Mar 31 '17 at 21:02
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Also worth noting that these figures are based on a "high productivity" Wisconsin farm. I've got nothing against Wisconsin, the problem is the huge reliance on results from a single farm.

A large part of the dairy related emissions are in the form of methane .. and dairy farmers in NZ appear to have achieved significantly lower emissions by changing the diet of their stock. E.g. see this article about goats' cheese: https://www.odt.co.nz/business/dairys-footprint-measured

1

Cow-milk cheese have a high carbon footprint because rasing cows have several negative effects on climate changing factors.

  • lots of cows a raised not only with simple grass - this would have not-so-bad effect, aside from the deforested land needed - they need extra proteins from soya: this causes major deforesting in Brazil for example
  • cow digestion produces considerable amount of methane that has huge greenhouse effect

On the other hand good cheese should not be eaten in large quantities: always eat your cheese on a piece of bread!

And consider eating goat cheese: raising goats is known to have smaller greenhouse effect.

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    This explains why dairy has a high carbon footprint, but not why cheese is higher than milk. – LShaver Mar 15 '17 at 2:43

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