Energy has become an important aspect of our lives. Without energy our nights would be dark. Without energy, transport would not move. Without energy there would be no civilization. Without energy everything we use in our daily lives would not work. Without energy we would live a primitive life. It's something like the building blocks of what we are today. We get energy in many ways. The most common method used to obtain it is the combustion of hydrocarbons (fossil fuels). 85% of the world's electricity is provided by the combustion of hydrocarbons. Hydrocarbon fuel is used to operate every mobile machine. Hydrocarbons are chemical compounds containing only hydrogen and carbon atoms. They are connected by single, double or triple bonds. Hydrocarbons can be in any state, from solid to low-melting point to gas. Hydrocarbons constitute a very large group that includes alkanes, alkenes and alkynes. There are different types of hydrocarbons. For example: saturated hydrocarbons and unsaturated hydrocarbons. Saturated hydrocarbons are the simplest type of hydrocarbons. Saturated hydrocarbons have a single hydrogen bond and are saturated with hydrogen. It is these types of hydrocarbons that make up our petroleum fuels that we use to produce energy. The primary source of hydrocarbons here on earth are fossil fuels: coal, natural gas and oil. They are extracted from the earth in millions of tons per day. We are consuming fossil fuels at a faster rate than the rate at which they are produced. According to statistics we will exhaust all the world's oil by 2050 and all the world's coal resources by 2500. Here is a table of the world's remaining fossil fuel reserves. Remaining world reserves of fossil fuels (in billions of barrels of ... ..... half of paper ...... people die If the final products after burning hydrocarbons are released without first treating them, people living in vicinity of the plant can get sick, transmitting the disease and consequently spreading the disease. The role of an individual is not to waste electricity just because it is there. Everyone should try to save as much energy as possible, this it is the role of an individual. For example: people can turn off the lights while leaving the room. The role of industries is to release the waste after treating it and not to release waste into places like rivers, lakes as the water comes. used for drinking and other purposes. They should treat the waste before discharging it. Alternative sources of energy will play a very important role as the world will run out of hydrocarbons as fuel in the coming years. It is our duty to preserve our resources.