Environmental Science EVS Unit 3 Energy Resources Renewable/Non renewable AEC semester 1/2 DU SOL NC

Recent questions

• What is renewable energy?

  Renewable energy refers to energy sources that are naturally replenished and can be used continuously without depleting their supply. These sources include solar, wind, hydroelectric, tidal, geothermal, biomass, and hydrogen energy. Unlike non-renewable energy sources, such as fossil fuels and nuclear power, which are finite and contribute to environmental pollution, renewable energy sources are characterized by their unlimited availability and lower environmental impact. They are essential for sustainable development as they help reduce greenhouse gas emissions and reliance on fossil fuels, making them a crucial component of efforts to combat climate change and promote a cleaner, more sustainable energy future.

• How does solar energy work?

  Solar energy works by harnessing sunlight and converting it into electricity using solar panels. These panels contain photovoltaic cells that capture sunlight and generate an electric current. Solar energy is a clean and renewable resource, meaning it does not produce harmful emissions during its operation. The systems can last between 30 to 40 years with minimal maintenance, making them a long-term investment. However, the efficiency of solar panels can be affected by weather conditions, and the initial installation costs can be high. Despite these challenges, solar energy remains one of the most accessible and environmentally friendly energy sources available today.

• What are the benefits of wind energy?

  Wind energy offers numerous benefits, making it an attractive renewable energy source. It is generated using windmills that convert the kinetic energy of wind into electricity, which is free and abundant. Wind energy is pollution-free, contributing to a reduction in greenhouse gas emissions and helping combat climate change. Additionally, it can be harnessed for various domestic applications, providing a sustainable energy solution. In India, for example, the largest wind farm located in Kanyakumari generates 380 megawatts of electricity. However, wind energy systems require a minimum wind speed of 15 km/h to operate effectively, which can limit their deployment in certain areas.

• What is geothermal energy?

  Geothermal energy is derived from the heat stored within the Earth, which can be accessed through natural geysers or by drilling into the Earth's crust. This energy source is sustainable and can be harnessed in regions with high geothermal activity, providing a reliable and consistent energy supply. Geothermal energy is considered environmentally friendly as it produces minimal emissions and has a low impact on the surrounding ecosystem. It can be used for various applications, including electricity generation and direct heating. As a renewable resource, geothermal energy plays a significant role in diversifying the energy mix and reducing dependence on fossil fuels.

• What is biogas and how is it produced?

  Biogas is a renewable energy source produced through the anaerobic degradation of organic matter, such as animal and plant waste. This process occurs in the absence of oxygen, resulting in a mixture of gases, primarily methane, carbon dioxide, and hydrogen. Biogas can be harnessed for various applications, including cooking, heating, and electricity generation, making it a versatile and low-cost energy solution. It is particularly suitable for areas with abundant organic waste, as it not only provides a clean energy source but also helps manage waste effectively. By utilizing biogas, communities can reduce their reliance on fossil fuels and contribute to a more sustainable energy future.