Commented explanation of several key terms of energy, especially from portfolio of renewable and non-renewable energy sources used both in current energy systems and in systems considered in the near future in the Czech Republic.

Since the combustion of solid fuels in heating boilers is attended by emissions of pollutants, in individual EU countries are gradually adopted different tightening requirements (emission and efficiency), which the appliance must meet. Requirements are targeted both the producers or importers of the combustion devices and theirs' operators. The aim of this article is to provide an overview of current and oncoming requirements and also show their comparison.

Scramble for Africa is a concept which is name for the period of colonial conquest of Africa between 1881 and 1914. The former European powers occupied continent of Africa by armies until the final allotment of the entire continent. Similar is the current battle of the Baltic countries for supremacy in building their own LNG terminal.

Besides the photovoltaic panels, which were already described enough, there are the second major components of photovoltaic plants - inverters. The main parameter for each inverter in terms of energy use is its efficiency. It means how much power from a DC input AC output gets.

In the past there has been several large blackouts in the world. Risk of such blackout reportedly increases with increasing of share of renewable energy sources in energy mix. In fact neither of previous blackouts were caused by renewables. Main primary causes are age of transmission system components or operator error. Frightening with several days outage caused by renewable sources is exaggerated.

Especially in terms of energy savings and safety must enforce closed appliances category C. It must not, however, commit inappropriate application of new regulations such as Government Regulation No. 91/2010 terms of fire safety during the operation of chimneys, flues and heating appliances.

Sewage water contains organic compounds, thermal and kinetic energy, the amount is about 9 times higher than is needed for cleaning. The biggest source of heat energy are beyond the wastewater treatment plants, hotels, schools, restaurants, hostels, administrative buildings and other public facilities. Also, a wellness center, swimming pools, spas, and hospitals.

Comparison of price developments in eight EU countries shows very interesting facts. Eg. for common Czech household with consumption 2.5-5 MWh / year electricity price increased in 2011 to 229% of the price in 2001. While the same household in Germany to only 115%. While the current price is very close (CR 3.07, Germany 3.50 CZK / kWh).

Article comments on the climate conference in Durban and generally evaluates negative results so far made climate conferences. Sad is that, the last climate conference in Doha ended with the same result - with no progress in reducing greenhouse gas emissions.

The unfavorable trend in the development of carbon monoxide poisoning in the operation of gas appliances category B hasn’t, despite increasing technical performance of these appliances, downward trend. What is the responsibility of manufacturers, operators, assembly and service companies, engineering inspectors and citizens - users in the operation of gas appliances in case of poisoning?

The article presents an extensive and detailed analytical study that explores in detail the possibility of directing the development of the European energy industry in order to achieve a significant reduction in greenhouse gas emissions and a significant decarbonisation of the energy sector. Roadmap is not to be predictions or plan for further development, its goals are more modest, to lend a hand in finding their own paths to member countries to a sustainable, economically viable and environmentally acceptable energy economy.

The unfavorable trend in the development of carbon monoxide poisoning in the operation of gas appliances category B hasn’t, despite increasing technical performance of these appliances, downward trend. What is the responsibility of manufacturers, operators, assembly and service companies, engineering inspectors and citizens - users in the operation of gas appliances in case of poisoning?

Directive 2010/31/EU of the European Parliament and of the Council on the energy performance of buildings requires that new buildings since 2018 (public buildings) and 2020 (all buildings) respectively were buildings with nearly net zero energy buildings. The requirement relates to the all technical systems of the buildings. The paper presents possible solutions in ventilation and air conditioning field in these buildings and presents considerations about possible developments with regard to the requirement of reducing energy consumption.

The article presents an extensive and detailed analytical study that explores in detail the possibility of directing the development of the European energy industry in order to achieve a significant reduction in greenhouse gas emissions and a significant decarbonisation of the energy sector. Roadmap is not to be predictions or plan for further development, its goals are more modest, to lend a hand in finding their own paths to member countries to a sustainable, economically viable and environmentally acceptable energy economy.

The article presents an extensive and detailed analytical study that explores in detail the possibility of directing the development of the European energy industry in order to achieve a significant reduction in greenhouse gas emissions and a significant decarbonisation of the energy sector. Roadmap is not to be predictions or plan for further development, its goals are more modest, to lend a hand in finding their own paths to member countries to a sustainable, economically viable and environmentally acceptable energy economy.

Miners’ protest in front of the Office of Government at 31st October 2012 against deleting the "expropriation paragraphs" in the Mining Act and reaffirm the validity of the so-called "territorial ecological limits" in the North Bohemian lignite basin by the Czech Government turned attention of the public to context of surface mining of lignite.