It is the InternationalDayOfForests. There are 3 trillion trees in the world with the potential of planting 1.5 trillion more. Forests provide habitats, medicine, livelihoods, regulate climate, water and soil and decrease pollution. Resilient forests mean resilient communities because they also regulate floods, decrease erosion and landslides.The better option is to reduce deforestation. And if you engage in reforestation you have to assess what kind of trees should be planted and where. On the whole though, forests are key for both climate mitigation and adaptation activities.