Use of biomasses as fuel is advantageous for a number of reasons. First of all, it does not increase the global amount of carbon dioxide in the atmosphere. In fact, the biomasses combustion process frees the same amount of CO2 as the amount absorbed by the plants during their entire life. 

Furthermore, use of biomasses such as forest residues, agricultural residues and wood-work residues, contributes to keeping the woods and land clean and creates new work opportunities. It therefore has a favourable effect on employment which, particularly in the rural areas, can lead to a minor dependence on energy from countries producing fossil fuels. Other advantages are its abundance, and the easy way to extract energy, the low sulphur content and as a consequence they do not contribute to the formation of acid rain, and the fact that at the end of the cycle they produce a potential fertilizer.

The different technologies to obtain energy from biomasses are very interesting also due to the fact that to obtain energy from this source means exploiting raw materials that currently are a cause of pollution (waste dumps, septic tanks, forests and land that are not cultivated and/or abandoned, etc.). Furthermore, it encourages an effort to plant a rotation of new forests in the areas that have been left bare, with a consequent advantage for the hydrogeological resistance to landslides. And, by controlling the forests and carrying out any activities related to the forests, makes it less easy for the pyromaniacs to carry out their activities.

However, it must be pointed out that also exploitation of biomasses has an impact on the environment. In some cases, use of wood as fuel, if it is not carried out according to the principle of sustainability (i.e. taking care to replace the heritage of trees that have been cut) can lead to a progressive deforestation.

At present in some areas that do not have many alternative energy resources, this impact is reported. At present, most of the energy coming from biomasses derives from firewood. There are some countries in the Third World, especially in Africa where over 70% of the energy requirement is obtained from  fire-wood combustion, a resource that , due to excessive exploitation in some areas can no longer be considered  renewable. 

Furthermore, intensive cultivation of some plants, in view of a future production of energy (the so-called energy crops) require vast areas of the territory in order to obtain significant quantities of fuel (land that is subtracted from agricultural activities for the production of food), and can involve use of fertilizers and other  substances that pollute the land and the water.

Biomass district-heating

A district heating system consists of a transport network and a heat production plant, which serves more than one building at the same time. The district heating plant can use co-generation technologies and/or renewable sources.

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An excellent solution

The excellent solution to exploit biomass, as well as the use of individual heating in pellet boilers (wooden balls) or nipper boilers, is the district heating with small-sized biomasses (10 megawatts), that supplies heat to households and/or business activities, and is located close to the biomass production site (wood, farm land, sawmill, etc). 

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