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The FAO has suggested that, over the period 2005–2050, effective use of tree planting could absorb about 10–20% of man-made emissions – so monitoring the condition of the world's forests must be part of a global strategy to mitigate emissions and protect ecosystem services. [20]
Throughout their lifespan, trees continue to sequester carbon, storing atmospheric CO 2 long-term. [41] Sustainable forest management, afforestation, reforestation are therefore important contributions to climate change mitigation. An important consideration in such efforts is that forests can turn from sinks to carbon sources.
Genetic diversity also ensures that forest trees can survive, adapt and evolve under changing environmental conditions. Furthermore, genetic diversity is the foundation of biological diversity at species and ecosystem levels. Forest genetic resources are therefore important to consider in forest management. [16]
Throughout their lifespan, trees continue to sequester carbon, storing atmospheric CO 2 long-term. [27] Sustainable forest management, afforestation, reforestation are therefore important contributions to climate change mitigation. An important consideration in such efforts is that forests can turn from sinks to carbon sources.
Deforestation or forest clearance is the removal and destruction of a forest or stand of trees from land that is then converted to non-forest use. [1] Deforestation can involve conversion of forest land to farms, ranches, or urban use. About 31% of Earth's land surface is covered by forests at present. [2]
The National Environment Policy of 1997 acts as a framework for environmental decision making in Tanzania. The policy objectives are to achieve the following: Ensure sustainable and equitable use of resources without degrading the environment or risking health or safety. Prevent and control degradation of land, water, vegetation and air.
An example given was that the average protection of 8.4% in biodiversity hotspots. Results have policy relevance in terms of the target of the Convention on Biological Diversity, reconfirmed in 2008, to conserve in an effective manner that “at least 10% of each of the world’s forest types”. [5]
The forest is a natural system that can supply different products and services. Forests supply water, mitigate climate change, provide habitats for wildlife including many pollinators which are essential for sustainable food production, provide timber and fuelwood, serve as a source of non-wood forest products including food and medicine, and contribute to rural livelihoods.