High environmental quality
The high efficiency levels and low emissions of CHP generation make it an environmentally acceptable solution for energy production. Modern CHP plants take advantage of efficient combustion technology to reduce nitrogen oxide emissions. 

Less waste disposal problems
Because CHP plants consume less fuel, the amount of waste can be reduced. This makes CHP environmentally very acceptable form of energy production.

Reduced air pollution
The decrease in fuel consumption reduces the burden of energy production on the environment. For instance, carbon dioxide emission from the firing of fossil fuels is reduced at the same rate as the use of fuels is reduced. The same goes for all other emissions, such as sulphur and nitrogen oxides.

CHP generation and district heating are favoured by authorities, because they are powerful tools for the reduction of CO₂ emissions. Air quality assessment in Finland’s largest cities, for example, indicates that sulphur emissions have been reduced as a direct result of CHP generation and district heating.