Identify the non - renewable source of energy from the following.
Coal
Understanding Non-Renewable Energy Sources
Energy sources are broadly classified into two categories: renewable and non-renewable. Understanding the difference is crucial for environmental awareness and energy policy.
What are Non-Renewable Sources?
Non-renewable energy sources are those that exist in finite amounts and are consumed much faster than they are naturally replenished. Once used, they are essentially gone or take millions of years to form again.
What are Renewable Sources?
Renewable energy sources are naturally replenished on a human timescale. They include sources like sunlight, wind, rain, tides, waves, and geothermal heat.
Analyzing the Given Options
Let's examine each option provided to determine if it is a non-renewable or renewable energy source:
| Option | Description | Classification |
|---|---|---|
| Fuel cells | A technology that converts chemical energy from a fuel (like hydrogen) into electricity through a chemical reaction with oxygen. The renewability depends on the source of the fuel. Hydrogen can be produced from fossil fuels (non-renewable) or water using renewable electricity (renewable). However, the fuel cell itself is a technology, not a primary energy source. In the context of primary energy sources, it's not typically classified as a source itself. | Technology (depends on fuel source) |
| Wind power | Energy generated by harnessing the kinetic energy of moving air (wind) using wind turbines. Wind is a natural atmospheric phenomenon driven by solar energy and earth's rotation, and it is continuously available. | Renewable Source |
| Wave power | Energy generated by harnessing the power of ocean surface waves. Waves are primarily caused by wind blowing over the water surface and are a continuously available natural phenomenon. | Renewable Source |
| Coal | A combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is formed from the remains of plants over millions of years. Extracting and burning coal depletes finite geological reserves. | Non-Renewable Source |
Based on the analysis, three of the options (Wind power, Wave power) are clearly renewable energy sources or technologies that rely on potentially renewable inputs (Fuel cells, depending on the fuel). One option, Coal, is a fossil fuel formed over geological timescales and exists in finite quantities that are being depleted by consumption.
Identifying the Non-Renewable Source
Among the given options, Coal is a classic example of a non-renewable energy source. It is a fossil fuel that took millions of years to form and is being consumed at a rate far exceeding its natural formation rate.
Conclusion
Therefore, the non-renewable source of energy from the provided options is Coal.
Revision Table: Key Energy Source Types
| Energy Type | Characteristics | Examples |
|---|---|---|
| Non-Renewable | Finite supply; depletes with use; takes millions of years to form. | Coal, Petroleum (Oil), Natural Gas, Nuclear (Uranium) |
| Renewable | Naturally replenished; sustainable; generally lower environmental impact during operation. | Solar, Wind, Hydroelectric, Geothermal, Biomass, Tidal, Wave |
Additional Information on Non-Renewable Sources
Non-renewable sources currently account for the majority of the world's energy supply. While they are often energy-dense and historically easy to extract and transport, their use raises concerns about:
- Resource depletion
- Environmental impact (e.g., air pollution, greenhouse gas emissions contributing to climate change, habitat destruction from mining)
- Price volatility based on supply and demand
Transitioning away from non-renewable energy sources towards renewable alternatives is a major focus of global efforts to combat climate change and ensure long-term energy security.
Important Questions from Fuels and Combustion
The pour point of any specific fuel is defined as -
A heat engine utilizes the
_________ involves breaking of fuel into fine particles.
Losses caused due to leakage of combustion products past the cylinder onto the crank case are termed as:
In a petrol engine, HC emission is found minimum in the exhaust during:
