Climate Change and Energy Production Notes

Energy Sources and Sustainability

  • A wide variety of energy sources are available globally, differing in:
    • Sustainability (environmental, economic, and social).
    • Cost.
    • Availability.
    • Interaction with global politics.

Energy Choices and Security

  • Choice of energy sources is complex and controversial.
  • Energy security is a major factor:
    • Ensuring reliable access to energy.

Climate Change: A Historical Perspective

  • Climate change is a normal part of Earth's history.
  • However, human activity has caused unprecedented changes in recent centuries.

The Climate Change Debate

  • Past debates existed about the causes of climate change.
  • In 2023, there is almost 100% consensus on the human role.

Global Impacts of Climate Change

  • Climate change has broad and significant impacts on:
    • Environmental systems (water, biological productivity).
    • Societies (people, cities, economies).

Climate Change: Mitigation and Adaptation

  • Mitigation: Reducing the causes of climate change.
    • Ties into the three-tiered pollution management strategies (Topic 1.5).
  • Adaptation: Adjusting to the inevitable changes in climate.
    • The Earth's systems have a time lag; climate will continue to change even if emissions stop.

Energy Sources: Variability and Sustainability

  • Energy sources vary in:
    • Sustainability.
    • Availability.
    • Cost.
    • Social-political implications.
  • Fossil fuels are still the dominant energy source due to existing infrastructure.
  • Low-carbon energy sources are growing.
  • Sustainability includes environmental, economic, and social factors.
  • Consider the sustainability of various energy sources:
    • Coal, oil, natural gas, nuclear, geothermal, solar, hydropower, wind, and biomass.
    • Sustainability varies by society.

Cost of Energy Sources

  • Energy sources vary in cost.
  • Solar has seen the greatest price drop.
  • Nuclear has seen the greatest price increase.
  • Changing values influence energy source choices.

Advantages and Disadvantages of Energy Sources

  • Evaluate the advantages and disadvantages of different energy sources.
  • Research the following for each energy source:
    • Total global reserves.
    • Power produced (energy density).
    • Carbon emissions (per unit basis).
    • Transportability.
    • Global distribution.

Factors Affecting Energy Source Choices

  • Consider factors influencing energy source choices for different countries:
    • Availability.
    • Main energy source.
    • Social-political influences.

Evaluating Sustainability of Energy Choices

  • Equity, sustainability, and security determine the sustainability of different societies' energy choices.
  • Refer to Visual Capitalist infographic for evaluation.

Energy Security: Complexity and Controversy

  • Energy security is complex and controversial.
  • Countries make different decisions based on circumstances.

Case Studies: Energy Security

  • Examples of countries to study:
    • Saudi Arabia: Petroleum producer.
    • China: Coal producer and consumer.
    • Ethiopia and Egypt: Nile River reliance (intertwined with Topics 4 and 5).
    • Iceland: Geothermal energy (Mid-Atlantic Ridge).
    • Norway: Transitioning from petroleum.
    • Costa Rica: Energy sustainability.
    • Cambodia: Hydropower potential but imports electricity.

Factors Influencing Energy Security

  • Advantages and disadvantages of energy sources.
  • Reserves, transportability, and location of energy sources.

Energy Security and Independence

  • Energy security depends on reliable and affordable energy.
  • A country should be able to produce enough electricity to meet its population's needs without reliance on external sources.
  • Dark red countries on the map are the most energy secure (Australia, New Zealand, the United States, Canada, and parts of Europe).
  • Dark brown countries are the least energy secure (primarily in Eastern and Southern Africa).

Geopolitical Implications

  • Energy insecurity leads to geopolitical implications.
  • Countries seek assistance from energy-independent nations, creating political leverage.

Influences on Energy Choices

  • Availability, sustainability, scientific and technological developments, and cultural attitudes.
  • Political and economic factors.
  • Historical events (e.g., 1970s fuel shortage) can change energy habits.

Improving Energy Security

  • Improve energy efficiency to reduce consumption.
  • Promote conservation, such as turning off lights and adjusting thermostats.

Global Implications of Energy Security

  • Energy security is a global issue with geopolitical and economic connections.
  • All nations must participate to address climate change.

Visualizing Temperature Change

  • Temperature change visualization over the last 150 years.
  • Cooler colors indicate average temperatures; warmer colors indicate higher temperatures.

Factors Affecting Energy Sources: Geopolitical Connections

  • Consider the geopolitical connections and how energy production/consumption habits are connected to other nations.

Evaluating Energy Strategy

  • A country needs to weigh the pros and cons of different factors for a named country.
  • Pros and cons should be identified for each factor.
  • An overall conclusion should be drawn.
  • International-mindedness links to this topic.

Climate Change: Causes and Impacts

  • Understanding how and why our climate is changing and its implications for the environment and human societies.

Unprecedented Climate Change

  • Climate change is not new, but the current rate and scale are unprecedented.
  • CO2 levels have spiked dramatically in the last 200 years, coinciding with the Industrial Revolution.

Climate vs. Weather

  • Weather: Atmospheric conditions at a given moment.
  • Climate: Long-term patterns of atmospheric behavior in an area.

Global Ocean Conveyor Belt

  • A massive system of currents that regulates Earth's climate.
  • Warm surface currents transport heat from the equator to the poles.
  • Cold, deep currents redistribute heat around the planet.

CO2 and Global Temperature Correlation

  • A strong correlation between CO2 levels and temperature over 800,000 years.
  • Changes in CO2 levels lead to temperature changes.

Extreme Weather Events

  • Climate change intensifies extreme weather events like Hurricane Katrina.
  • Warmer oceans provide more fuel for hurricanes.

Future Greenhouse Gas Emission Scenarios

  • Different policy choices lead to different outcomes.
  • RCP 8.5 (red pathway): Business as usual, potentially leading to temperature increases of 3.2 to 5.4 degrees Celsius.
  • RCP 2.6 (blue pathway): Aggressive action to reduce emissions.

Global Greenhouse Gas Emissions by Sector

  • The energy sector dominates, accounting for 73.2% of emissions.
  • Impacts vary regionally; for example, rising temperatures in Cambodia.

Potential Sea Level Rise Impacts

  • Sea level rise could submerge entire regions, including Florida and parts of the Atlantic Seaboard.
  • Coastal cities are particularly vulnerable.

Scientific Consensus on Climate Change

  • 97 out of 100 climate experts agree that humans are causing global warming.

Public Attitudes Towards Climate Education

  • 77% of Americans support teaching children about climate change.

Climate Model Projections

  • Climate models show an upward trend in temperature despite variations.

Climate Change Knowledge Portal

  • The World Bank's portal helps understand climate impacts at local and regional levels.
  • It combines data on temperature, precipitation, and other variables.

Climate Change Impacts on Multiple Systems

  • Climate change affects rain patterns, species migration, and ocean acidification.
  • These changes impact both natural systems and human societies.

Projected Changes in Forest Types

  • Dramatic shifts in biome distribution are projected.
  • Changes in tree species affect wildlife habitat, ecosystem services, and carbon storage.

Future Water Availability

  • Agricultural regions will experience water deficits, threatening food security and ecosystem stability.

Forest Distribution Changes Over Time

  • Climate change pushes ecological zones northward.
  • Species must adapt, relocate, or face local extinction.

Temperature Increase Impact on Biodiversity

  • A 1 to 2°C temperature increase has complex impacts on biodiversity.
  • Arctic ecosystems are especially vulnerable.

Interconnectedness of Biodiversity Loss and Climate Change

  • Changes in one area can trigger downstream effects on ecosystem functions.

Potential Coastal Flooding Impacts

  • Coastal regions are centers of economic activity and cultural heritage.
  • Projected inundation would force human migration and require adaptation or relocation resources.

Impacts of Ocean Acidification

  • Oceans absorb atmospheric CO2, leading to increased acidity.
  • This impacts organisms that build shells or skeletons from calcium carbonate.

Feedback Mechanisms and Time Lags

  • Desertification, biodiversity loss, and climate change are interconnected.
  • These cycles can take decades or centuries to fully manifest.

Intervention Points

  • Connections between soil erosion and reduced carbon reserves suggest that soil conservation can help mitigate climate change impacts.

International-Mindedness

  • Coordination action across borders.
  • Equity, responsibility, and the nature of knowledge itself.

Climate Change: Mitigation vs adaptation

  • Even if carbon emission stops completely right now, the Earth's climate will continue to warm for the next 100 to 200 years.

A Spectrum of Actions

  • Replacing incandescent bulbs with LED bulbs is the lowest impactful actions.
  • Having fewer children is the number one most impactful action for climate change is that every single person who is born brings their own ecological footprint.
  • The next most impactful things we can do are to live a life car-free, to avoid flying all over the place, to purchase our energy sources primarily from green sources such as wind, solar, hydro, and ocean sources, and we can also switch to a plant-based diet where we eat lower on the food chain or at lower trophic levels.

Strategies for Climate Change Mitigation

  • Reduce the total amount of energy that we consume by using a three-tiered approach.
  • Improve the overall efficiency of transportation that we use.
  • Reduce the amount of greenhouse gases (GHGs) we emit by shifting from individual vehicles to mass transit.
  • Shifting from fossil fuels to renewable sources of energy.
  • Be careful when you're considering renewables because not every renewable resource is a zero-carbon or low-carbon emitter.

Reducing GHG Emissions from Agriculture

  • Livestock release greenhouse gases.
    • CO2 and methane.
  • Mechanization on large industrial farms releases carbon dioxide as well.

Renewable Energy Sources

  • Use caution when considering concrete dams, because of the amount of concrete.
  • Concrete is a very CO2-intensive material because of the production of the material and the breaking down of limestone-based rocks where carbon in the form of calcium carbonate has been stored and locked away in a solid form for many millions of years.

Geoengineering

  • Afforestation: Planting forests on a large scale.
    • Trees remove gaseous carbon from the atmosphere and lock it into a solid form as biomass.
    • Afforestation is a great example of a carbon dioxide removal technique that protects and enhances our carbon sinks in Earth's atmospheric system.
  • Maintain biologically productive biomes around the equator such as the the Amazon rainforest in South America, the Congo Basin rainforest in Africa, and the tropical rainforest spread across Asia

Biomass as a Fuel Source

  • Biomass is considered a renewable resource that can be replenished relatively quickly.
  • Peat is generally seen as a biomass energy source.
  • Tread carefully when considering peat as an alternative to fossil fuels.

Crops Used as Biomass

  • Growing crops to be used as biomass creates potential benefits.
  • The rate of replenishment of that biomass is quite rapid because crops can be grown annually or sometimes even twice a year.

Carbon Capture and Storage

  • CO2 will be pressurized from a gas form into a liquid form and pumped deep underground.
  • The pressurized liquid or gas form can't trap infrared radiation.