Contents: Preface. 1. Introduction. 2. Forest composition and environments. 3. Improvement trees in the urban environment. 4. Atmospheric conditions of forestry. 5. Nutritional and ecological requirements in forest. 6. Forest ecosystems. 7. Biodiversity conservation in forest environment. Bibliography. Index. Forests are ecosystem in which the major ecological characteristics reflects the dominance of ecosystem conditions and processes by trees. The key functional aspects of forest ecosystem are energy capture and biomass creation, nutrient cycling and the regulation of atmospheric and water chemistry, and important contributions to the regulation of the water cycle. The present book comprises of seven chapters, which covers the introduction, forest composition and environment, improvement of trees in the urban environment, atmospheric conditions of the forestry, nutritional and ecological requirements in plants forest ecosystems and biodiversity conservation in forest environment