Reforestation activities promote the sequestration of CO2 from the atmosphere, thereby decreasing the concentration of this gas and thus play an important role in aginst greenhouse effect. The removal of CO2 from the atmosphere through the photosynthesis  allows the fixation of carbon in vegetation biomass and soils.

As the vegetation grows, the carbon is being incorporated into the trunks, branches, leaves and roots. About 50% of plant biomass consists of carbon, and the Amazon forest is a major global stock of carbon in its field and density of biomass. The Amazon forest stores about 140 tons of carbon per hectare.

Reforestation has a great importance in fighting against climate change, the increase of water resources, reduction of losses in agriculture related to floods, increase the stock sustainable  and legal timber, CO2 sequestration and reducing greenhouse gases.

•  The trees prevent or reduce soil erosion and water contamination.
  
• According to its situation, species, size and condition, the shade from trees can reduce spending on air conditioning for residential and commercial buildings from a percentage of 15% to 50%.
  
• The shade from trees cools the streets and parking lots. Temperatures in cities tend to register between 5:09 degrees more than in regions where there are trees.
  
• Trees are a natural means of cooling that reduces the need for the construction of hydroelectric and nuclear
  
• Contributing to the undercurrents and the maintenance of rivers.
  
• Planted treesreduce significantly noise pollution at road junctions, a large move.
  
• Serve as visual barriers.
  
• It is a constant source of fuel for stoves and power plants.
  
• The planned and controlled management of forests is a sustainable source of wood.
  
• Trees of a residential or commercial, well placed and cared for, can increase the value of the property, and protect them from wind.
  
• Forests have a role important in the preservation of wild fauna and flor.