Food and Greenhouse Gas emissions Using information taken from...

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Presentation transcript:

Food and Greenhouse Gas emissions Using information taken from...

Carbon Dioxide and Climate Change CO 2 is a greenhouse gas. Some gases are lighter than air e.g. Helium. CO 2 is heavier than air. How big do you think a kg of CO 2 is?

Greenhouse gases Carbon Dioxide CO 2 Methane CH 4 Nitrous Oxide N 2 O 1kg CO 2 =1 kg CO 2 e 1kg CH 4 =25 kg CO 2 e 1Kg N 2 0 =300 kg CO 2 e

Work with a partner 1.Order food and drink cards by ‘carbon intensity’, with the item that emits the most CO 2 e at the top and the least at the bottom. 2.Now take a pile of footprint cards and match the food and drink with the amount of CO 2 e you and your partner think it produces.

Additional information to help you, Remember that Methane is a 25 times more potent green house gas than CO 2, Methane is produced by cows in the production of meat and milk based products. Assume the cup of tea is made with milk and the normal practice of boiling around double the water needed. Assume the carrots are average- grown in UK, non organic, supermarket bought. You bought the tomatoes in March (this makes a big difference as they are grown in a heated greenhouse).

A banana

80g CO 2 e How many grams of CO 2 e for a bunch of 6 bananas?

A mug of tea

71g CO 2 e No milk and boil only 1 mug of water 20g CO 2 e A large Latte 340g CO 2 e

1kg of carrots

300g CO 2 e Estimate how much for 1 carrot.

A 500ml bottle of Water

160g CO 2 e What if you had a bottle of water every day for a year?

An Ice cream (from an ice cream van)

500g CO 2 e What if you had an ice cream every week for a year?

A cheeseburger

2.5kg CO 2 e How many bananas have the equivalent emissions?

1kg of organic vine tomatoes (UK grown)

50kg CO 2 e

Talk with your partner... How can we trust this information? What have you learnt? What might you think about in the future? What will you tell others about what you’ve learnt?