Renewable energy sources are: all natural sources that are virtually inexhaustible or exist indefinitely. These are – the energy of the sun, the strength of the wind, the energy of water in dams, water currents or waves, the heat coming from the earth’s core, gas that is deposited in the decomposition of bio-waste (food waste and others).

We call oil – black gold, forests – the green gold of the planet.

Oil – the black gold of the planet.

Oil (from the Greek πέτρα – rock and έλαιο – oil), also called crude oil, is a thick and black liquid. It is a natural material produced mainly from hydrocarbons. Most oil is found by drilling through rocks on land or at sea on continental rocks. The main producers are in the Middle East, America and Russia. It is the world’s most important source of fuel. It supplies 38% of the world’s energy. Crude oil is a mixture of many different chemicals, mostly hydrocarbons, most of which burn well. The oil can be easily transported by pipeline. Processed oil can be used as fuel; mainly petrol for automobiles, diesel fuel for diesel engines used in trucks, trains and ships, kerosene fuel for jet engines and as lubricants.

Petroleum by-products are: alcohols, antiseptics, artificial rubber, detergents, drugs, explosives, food additives, insecticides, perfumes, plastics, textile fibers.

We call forests green gold. We depend on forests for our survival, the air because of the air we breathe, and the wood we use. In addition to providing habitat for animals and products for humans, forests also offer protection to water basins, prevent soil erosion and mitigate climate change.

Forests are an important part of any ecosystem. An ecosystem consists of all living and non-living beings in an area. This includes all plants, animals and other living things. An ecosystem also includes inanimate materials such as water, rocks, soil and sand. All organisms in the ecosystem have needs, such as food, water and air. If the needs of organisms are not met with these resources, they cannot survive.

Animals usually need food, water and shelter. For example: if deer eat grass and the place where they live (their ecosystem) no longer has grass, they have to move somewhere else or risk not surviving.

Felling trees – causes and consequences

When people cut down forests end masse, it leads to major changes in ecosystems. Sometimes the damage caused cannot be repaired.

Other natural resources are: uranium, natural gas, coal. Uranium is an extremely valuable natural resource because it is found in limited quantities. In contrast, minerals are common, but they are an exhaustive source.