How many trees have to be felled to provide the world with just one day of loo roll?   Answer here

How many fruit trees do you need to make an orchard?   Answer here

Where is the UK's most valuable tree?   Answer here

The fruit of which tree has six times more vitamin C than an orange?   Answer here

Where will you find the oldest tree in Europe?   Answer here

Which is the only poisonous tree in Europe?   Answer here