Technology and the Environment: Causes and Effects of Environmental Changes

Global Challenges and Solidarity
  • Climate change is a global issue that transcends national borders and socio-economic divides.
  • Quote from Ban Ki-moon, UN Secretary General (2007-2016) emphasizes the need for global solidarity.
Essential Question
  • What were the causes and effects of environmental changes from 1900 to the present?
Causes of Environmental Changes

  1. Population Growth

    • 1900: 1.6 billion people; 1950: 2.55 billion; 2000: 6.12 billion.
    • Increased population led to demand for more agricultural lands.
    • Resulted in:
      • Deforestation: Loss of forests to clear land for agriculture.
      • Soil erosion and habitat loss for various species.

  2. Urbanization

    • By 2025, estimated urban population: 5.1 billion.
    • Increased waste production from cities, leading to water pollution and depletion of natural resources.

  3. Globalization and Industrialization

    • Spread of industrialization increased demand for natural resources.
    • Development of a new middle class necessitated the consumption of more goods and resources, resulting in pollution.
Effects of Environmental Changes

  1. Resource Depletion

    • Since the mid-1800s, significant depletion of resources, especially petroleum.
    • Predictions: Remaining oil reserves could be consumed in the next 30-40 years.
    • Coal reserves could last longer, but high demand could lead to depletion in about 60 years.

  2. Inequality and Scarcity

    • UN reports: 31 countries facing water scarcity.
    • Over 1 billion people lack access to clean drinking water.
    • Water scarcity disproportionately affects women and children, impacting their educational and economic opportunities.
    • Example: In Ghana, reducing water collection time by 15 minutes could increase girls' school attendance by 8-12%.

  3. Changes in Atmosphere

    • Industrial activities emitted pollutants like carbon dioxide, contributing to global warming.
    • Natural carbon trapping resources (forests, ground cover) depleting.
Development of Renewable Energy Sources
  • Investment in renewable energy (wind, solar, geothermal) due to concerns over fossil fuel sustainability.
  • Currently, renewable energy constitutes about 7% of global energy needs, with projections suggesting this could increase significantly by 2050.
Increasing Environmental Awareness
  • Formation of groups like the Club of Rome in 1968 advocating for sustainability.
  • Example: Green Belt Movement footprint in Kenya, planting over 51 million trees to combat deforestation and improve soil quality.
Debates and Global Action on Climate Change
  • Global Warming: Caused by emissions from burning fossil fuels, leading to potential climate crises (e.g., severe weather events).
  • Global Agreements:
    • Kyoto Protocol (1997): Aimed to reduce carbon emissions but faced challenges in implementation.
    • Paris Agreement (2015): 195 countries committed to climate action, although the U.S. planned to withdraw in 2017.
Climate Activism
  • Greta Thunberg led a global climate strike in 2019, raising awareness about climate change impacts.
  • Extinction Rebellion, formed in 2018, engaged in civil disobedience for climate action.
The Anthropocene Epoch
  • Some scientists argue humanity's impact on the planet warrants naming this period the Anthropocene instead of the Holocene due to extensive environmental changes.
Key Terms by Theme
  • Culture: Green Party, Green Belt Movement.
  • Environment: Deforestation, desertification, air quality, greenhouse gases, fossil fuels, water scarcity, renewable energy, global warming, carbon footprint, Anthropocene.
  • Government: Kyoto Protocol, Paris Agreement.