Climate changes, reduction of CO2 emissions, sustainable biomass, phasing out of fossil fuels, such as coal, oil and natural gas, have all become concepts that no politician or energy company today can ignore. The popular focus has simply become too significant. A wave runs through many countries: we must reduce the number of annual flights; we need to drive less by car; we need to eat less meat, as the production of meat requires more energy than the production of vegetable foods; we have to recycle more etc. In countries such as China, natural gas, electricity, geothermal heat, biomass, solar, industrial surplus heat, ultralow emission coal (CHP), and nuclear power are defined as resources for "clean heating". This definition says nothing about the emission of CO2 from the individual elements - ex. the production of electricity can be based on condensation operation with an efficiency of less than 40% and based on coal as fuel. Just as we are challenged by electricity as "clean heating" in China, we have a general challenge in many countries regarding the use of biomass. If the biomass is obtained by deforestation without equivalent new planting in parallel, the overall climate account is not in balance.
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