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What is an energy crisis?
Industry, private homes, commerce, and transportation require energy. Until recently, this demand was met primarily by fossil fuels—that is, by burning coal, gas, and oil. These energy sources, unlike biomass and renewable energy sources, are called fossil fuels. When existing energy reserves are no longer available in quantities sufficient to meet demand, an energy crisis occurs.
Fuel shortages as a cause – examples from the past
History is replete with examples of energy crises, from the timber shortage in 18th-century England to the oil crises of the early and late 1970s. We must also not forget the crisis scenario posed by climate change, with all its environmental and economic consequences. At the root of all energy crises lies the fact that a proven energy source can no longer be used to the same extent as before. Historically, this has most often been the case with oil. However, there have also been crises affecting natural gas and electricity supplies.
The causes of energy shortages vary depending on the source. In historic England, timber supplies disappeared due to over-logging for shipbuilding. The oil crises of the last century arose from sharp price increases caused by artificial shortages of raw materials. Thus, the security of our energy supply is threatened not only when natural resource limits are reached, but also when geopolitical events lead to shortages. The most recent example is wars, which highlight the dependence of countries involved in conflicts on oil and gas imports.
Global peak oil – the final crisis
Regardless of global political events, which can change suddenly and dramatically, we face a final crisis—the moment when natural oil reserves are depleted. It’s impossible to pinpoint the exact date of this moment, known as peak oil, but one thing is clear: Sooner or later, fossil fuels will be exhausted. This is one reason why expanding alternative energy sources is such a high priority. But there are other reasons, too.
Climate change is accelerating the energy crisis.
Fossil fuels are the primary source of anthropogenic climate change. Burning them releases carbon dioxide (CO₂), which, combined with other greenhouse gas emissions, causes global warming. The consequences include more frequent hurricanes, storm surges due to rising sea levels, and droughts combined with crop failures. Scientists estimate projected damage in the tens of billions of dollars. A third of global CO₂ emissions come from energy supplies for buildings. In private homes, heating accounts for up to 80 percent of energy consumption. There is enormous potential for savings here that can be harnessed to prevent an energy crisis. Renewable energy sources are key.
Using renewable energy sources as a way out of the crisis
Transitioning to renewable energy sources can halt undesirable climate change and reduce dependence on fossil fuels. Renewable energy sources include all those that are virtually inexhaustible or rapidly renewable. These include:
- Geothermal energy (green energy)
- solar energy
- Biomass (eg wood).
A number of technologies are available for the residential, commercial, and community sectors to efficiently utilize renewable energy sources. These include:
- Heat pumps
- photovoltaic systems
- Solar thermal energy
- Pellet heating systems
The following video, using the new Viessmann Vitocal heat pump as an example, shows how renewable heat generators can help to achieve greater independence from fossil fuels:
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Since the transition to renewable heat generators cannot be completed overnight, and renewable energy sources are not completely free, there are other measures that play a role in preventing an energy crisis. First and foremost, this includes energy conservation and increased energy efficiency. In household settings, this can sometimes be achieved through simple measures, as discussed in the next section.
Energy Crisis Measures and Tips: What Can I Do Myself?
In the wake of the recent energy crisis, consumers and homeowners are faced with a simple question: What can I do myself? How can I save energy? And is it even possible to become independent of fossil fuels, whose prices fluctuate so wildly? The list below shows a number of measures you can take to improve efficiency and save money. Clicking on the link will take you to the relevant guide.
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