The challenge of 'reducing the carbon footprint of a cup of tea' is introduced through a couple of  slides of its Production (Value) Chain Students in pairs  discuss which part of the chain  they think is worst for the environment Answers are compared with Unilever's Students think-pair-share about what can be done in order to reduce the impact of the Production/Value Chain on the environment. Students work in  teams in order to rank their top six ideas and prepare their ‘pitch’ 'Hints' can be "purchased" A vote is taken.