One of our tasks was to save our Christmas tree's roots and replat it outside. Because we have frost (the ground is also frozen) we can't plant anything for a while. Instead we can use wood for heating or we can compost it. Wood is a renewable natural resource in Finland. We have approximately 26 million hectares of forest and we try to take good care of it. On spring we plant small birches (photo). In time they will grow into a new forest. We have also planted some apple trees, cherry trees, pear trees and plum trees to our school garden.