The Mizos, who earlier used to practice the slash-and-burn cultivation since times immemorial, have now realized the importance of planting trees, Mizoram Chief Minister Zoramthanga said here today. Speaking on the occasion of the Green Mizoram Day, Zoramthanga regretted that the traditional slash-and-burn cultivation had resulted in large-scale deforestation. "However, Mizos have realised the importance of planting trees. If we continue to plant more and more trees each year, we can preserve our God-gifted green forests and save us from the global warming,' he said.