Renewable Energy Sources and Ozone Layer Protection

Deterioration of the Ozone Layer

Ozone (O₃) in the stratosphere absorbs 90% of ultraviolet radiation reaching the Earth from the Sun, protecting living beings from harmful effects. Gases such as chlorofluorocarbons (CFCs), used in aerosols and refrigeration circuits, react with and destroy ozone molecules, which increases the amount of UV radiation reaching the Earth.

Renewable Energy Sources

Biomass Energy

Biomass consists of organic matter from vegetable or animal sources. There are several ways to utilize biomass energy:

• Direct use: Agricultural, livestock, and forestry residues used as fuel.
• Biogas: Processing animal waste through microorganism fermentation.
• Biofuels: Obtaining bioethanol and biodiesel.
• Incineration: Utilizing heat from municipal waste incinerators to warm water.

Solar Power

The Sun produces radiant energy known as solar power. The Earth receives 4,000 times more energy than is consumed, though it is difficult to harness due to its discontinuous and scattered nature.

• Solar Thermal Energy: Used at low temperatures in households or for thermoelectric power.
• Photovoltaic Solar Energy: Exploits the photovoltaic effect, where light hitting a semiconductor generates a flow of electrons.

Hydraulic Energy

Its source is the potential energy of a mass of water stored behind a natural or artificial barrier. Formerly used in mills and forges, it is now primarily used to produce electricity.

Wind Power

Its source is the kinetic energy of the wind. Previously used in mills and for sailing, it is now utilized to produce electricity via wind turbines.

Geothermal Energy

This energy is stored in the Earth's crust. It is harnessed by injecting cold water into the basement, which then returns as hot water or steam.

Tidal Energy

Based on the potential energy of seawater rising and falling due to tides. It requires a levee that closes at high tide, using turbines driven by water as the tide recedes.

Advantages of Renewable Energy

Renewable sources offer significant benefits:

• Inexhaustible: Reserves are virtually infinite.
• Environmental Impact: Lower impact compared to non-renewable sources.
• Energy Independence: Indigenous nature allows consumption where it is produced, reducing reliance on other countries.
• Technological Development: Use favors the advancement of necessary engine and power technologies.