water consumption

How many litres of water per cup (125ml) are needed for a cup of coffee?

• 125 ml

• 13 litres

• 132 litres

• 1320 litres

Answer explanation

Global average water footprint: 130 litres for 1 cup of coffee.About 18900 litres of water are needed to produce 1 kg of roasted coffee. For a standard cup of coffee (125 ml) we require 7 gram of roasted coffee, so that a cup of coffee costs 130 litres of water.

How many litres of water do we need for on average, one tomato (250 gram)?

• 5 litres

• 50 litres

• 500 litres

• 5000 litres

Answer explanation

Tomato

On average, one tomato (250 gram) costs 50 litres of water. Tomato ketchup costs 530 litres of water per kilogram of tomato ketchup. Tomato puree costs 710 litres of water per kilogram of tomato puree.

On average, one peach (150 gram) has a water footprint of .............. litre of water.

• 1,4 litres

• 14 litres

• 140 litres

• 1400 litres

Answer explanation

On average, one peach (150 gram) has a water footprint of 140 litre of water.In China, the largest peach/nectarine producing country in the world, the average water footprint of peach is 1120 litre/kg and in Italy, the second largest peach/nectarine producing country, the average water footprint of peach is 450 litre/kg. The global average is 910 litre/kg.

The global average water footprint of sheep meat is ........... litre/kg.

• 10400litres/kg

• 1040 litres/kg

• 104 litres/kg

• 10,4 litres/kg

Answer explanation

The global average water footprint of sheep meat is 10400 litre/kg. The water footprint of the meat strongly depends on the production system from which the meat is derived (grazing, mixed or industrial), the composition of the feed and the origin of the feed.The global water footprint of sheep in the period 1996-2005 was about 71 billion m3/yr, which was 3% of the total water footprint of animal production in the world (all farm animals) (Mekonnen and Hoekstra, 2010, 2012).

The global average water footprint of beef is ........ litre/kg.

• 154 litre/kg

• 1540 litre/kg

• 15,4 litre/kg

• 15400 litre/kg

Answer explanation

The global average water footprint of beef is 15400 litre/kg. This is predominantly green water (94%). The water footprint related to the animal feed takes by far the largest share (99%) in the total water footprint of beef. Drinking and service water contribute only 1% toward the total water footprint, but 30% to the blue water footprint. The major fraction (83%) of the water footprint of a beef cow is attributed to the derived beef, but smaller fractions go to the other products: offal, leather and semen.

A bovine (leather) animal at the end of its life time has an average water footprint of ........ litre.

• 1,890,000

• 189,000

• 1,890

• 1,89

Answer explanation

A bovine animal at the end of its life time has an average water footprint of 1,890,000 litre. The major fraction (83%) of the water footprint of the animal is attributed to the derived beef, while, on average, 5.5% is attributed to the bovine leather (and the remaining fractions to other products). A fully grown beef cow weighing 250 kg will produce 6 kg of leather so that the water footprint of bovine leather is 17,000 litre/kg (Mekonnen and Hoekstra, 2010). Obviously, great variations for the water footprint of leather exist, depending on the place where and production system in which the animal is raised.

The global average water footprint of cotton fabric is ..... litre per kilogram

• 10

• 100

• 1000

• 10,000

Answer explanation

Global average water footprint

2495 litre for a shirt of 250 gram

The global average water footprint of whole cow milk is about ..... litre/kg

• 9,4

• 94

• 940

• 9400

Answer explanation

One kilogram of whole milk gives about 50 gram of butter, so that the water footprint of butter is 5550 litre/kg (Mekonnen and Hoekstra, 2010, 2012).

A 100-gram chocolate bar costs ...... litres.

• 17

• 170

• 1700

• 17000

Paddy rice (the rice as harvested from the field) requires ....... litres of water per kg

• 16,7

• 167

• 1670

• 16700