Introduction

They're the ultimate Christmas decoration and millions are bought around the world each year. But what impact do Christmas trees - real and artificial - have on the environment? Neil and Sam discuss Christmas's carbon footprint and teach you some new vocabulary all in 6 minutes!

This week's question

In 2010, a Christmas tree in Belgium was awarded the Guinness World Record for having the most lights on it – but do you how many? Were there…

a) 19,672

b) 94,672, or

c) 194,672

Listen to the programme to find out the answer.