•
The decrease of harmful gas emissions equals the emissions, obtained from the combustion of an alternative fuel (electricity, heavy fuel oil, light fuel oil);
•
The increase of harmful gases emissions is due to transportation costs, which emit gases when light fuel oil is used;
•
The increase of harmful gases emissions is also due to electricity usage for the needs of the boiler facilities.
The economic sustainability is expected through utilizing of potential resources to best advantages.
These resources can be efficient and responsible, and are likely to provide long-term benefits. In the case of this business model, economic sustainability leads to rational using of resources so that the business model continues to function over a number of years, while consistently returning a profit.
36