Everybody knows that forests are important, they absorb carbon dioxide and generate oxygen, are home to many animal species, provide the basis of many modern medicines, and are under threat from human activity, but did you know...

* Forests cover one third of Earth's land (that's 4 billion hectares, or the equivalent of 40 billion Olympic sized swimming pools)?

* Some countries have no forest?

* Some countries have increased the forest in recent years?

* Which countries have seen deforestation?

If not, then this is the quiz for you!

Play and see which countries are home to the World's forests and how they are changing.