Energy and the Environment - In-depth Notes

Learning Outcomes

• Name fossil fuels and describe how they are formed.

• Classify energy sources into renewable and non-renewable types.

• Describe how different energy sources are used to make electricity.

• Explain the environmental, economic, and social consequences of different energy sources.

• Discuss different demands for energy.

• Explain how energy sources can be managed efficiently.

• Discuss current research into possible new energy sources.

• Describe the impact of oil pollution.

• Describe how the impacts of oil spills can be minimized.

The Need for Power

• Consensus among scientists on link between fossil fuel combustion (oil, coal, gas) and climate change.

• Burning fossil fuels releases CO2 and greenhouse gases, leading to global temperature rise.

• Fossil fuels are valuable but may need to remain untapped to mitigate global warming.

• Goal to limit global temperature increase to 2°C to avoid severe consequences of climate change.

• Key questions about feasibility of withdrawing from fossil fuels and adopting alternative energy sources.

2.1 Fossil Fuels

• Energy-dense sources like natural gas, coal, and oil derived from decay of ancient organic matter.

• Formation of Fossil Fuels:

• Formed from decayed plant and animal matter under sediment subjected to heat and pressure.

• Coal from peat; oil and natural gas from organic matter in marine environments.

2.2 Energy Resources

• Rising Demand for Energy:

• Driven by increased population, industrialization, urbanization, and improved living standards.

• Types of Energy Sources:

• Non-renewable: Limited and cannot be replaced (e.g., oil, coal, natural gas, nuclear).

• Renewable: Can be replenished (e.g., solar, wind, renewable biofuels).

• How Energy Sources are Used:

• Most energy sources burned to produce heat or light.

• Main method for generating electricity is through electromagnetic induction using turbines.

• Turbines powered by various energy sources, integrating renewables into the grid.

2.3 Using Different Energy Sources

• Economic Factors:

• Energy availability dictates local supply prices; scarcity leads to price increases.

• Reliance on local supplies reduces costs and enhances energy security.

• Social Factors:

• Energy use can create jobs but may displace communities or disrupt agriculture.

• Energy projects improve infrastructure but may introduce health risks.

• Environmental Factors:

• Renewable sources produce fewer emissions compared to fossil fuels and nuclear.

• Pollution and habitat destruction are concerns from energy extraction.

2.4 Management of Energy Resources

• Strategies for Effective Use:

• Improve energy efficiency through technology, better insulation, and energy-efficient appliances.

• Energy from Waste: Using anaerobic digestion and incineration to convert waste into energy.

• Investment in Renewable Energy Technologies: Encourage implementation of solar panels and wind turbines.

• Fracking (Hydraulic Fracturing): Expands natural gas access but raises environmental concerns.

• Ongoing education on energy conservation and efficiency is critical.

• Demand Response Programs: Incentivize consumers to reduce or shift power usage during peak times.

• Smart Grids: Enhance energy distribution efficiency, integrating renewable sources in real-time.

2.5 Impact of Oil Pollution

• Oil spills disrupt marine and coastal ecosystems; difficult to clean up.

• Types of Oil Spill Causes:

• Offshore extraction, pipeline leaks, tanker accidents.

• Responses include international treaties (e.g., MARPOL), improved tanker safety designs, and cleanup methods.

Summary

• Understand formation and types of fossil fuels, electricity generation methods, effective energy management, oil pollution impacts, and transition