Global Environmental Policy, Climate Impacts, and Key Definitions

Global Vegetation Types

• Atlantic Deciduous: Oak and beech forests.
• Mediterranean: Coniferous pine and evergreen species.

Environmental Contamination Defined

Contamination is the introduction of harmful elements into the environment to an extent that the ecosystem cannot absorb them without suffering damage and degeneration.

Chernobyl Nuclear Accident (April 26, 1986)

The accident occurred due to an uncontrolled power increase, leading to an explosion of hydrogen accumulated within the reactor core. The lack of a containment building resulted in the widespread scattering of radioactive material, causing radioactive fallout (rain).

Implications of the Disaster

• Affected 600,000 people.
• Estimated 500,000 deaths attributed to the initial radioactive cloud exposure.
• 30,000 deaths recorded in the following years due to related illnesses.

International Climate Agreements

Kyoto Protocol (1997)

Target period (2008–2012): Achieve a 5.2% reduction in greenhouse gas emissions compared to 1990 levels.

Commitments by Key Parties:

• 55 nations joined.
• European Union (EU): 8% reduction target.
• Japan: 6% reduction target.
• United States (U.S.): 7% reduction target (Note: The U.S. did not ratify the protocol).

Emissions Trading

A mechanism allowing industrialized countries that have reduced their emissions below target to sell emission credits to those who have not.

Aalborg Charter

An agenda with purposes similar to Agenda 21, focusing on local sustainability and efforts to slow temperature rise.

Climate Change: Causes and Global Response

Climate change has been observed since the Industrial Revolution (19th century), driven by factors such as new modes of transport and technological advancements. The text notes that deforestation for biofuel production is considered unrealistic.

Geographical Impact Note

The Tibetan Plateau is the source of major rivers, supporting 40% of the world's population.

Key Environmental Conferences

• Stockholm (1972): Focused on raising global awareness for environmental change.
• Rio de Janeiro (1992): Noted for addressing excessive pollution.
• Copenhagen (December 2009): Held to review and establish a successor framework to the Kyoto Protocol after 2012.

The Stern Review

A landmark report focusing on the economics of climate change and the costs associated with inaction versus mitigation.

Major Environmental Consequence

Acid rain.

Major Impacts of Climate Change

• Agriculture and Food Security: Loss of agricultural productivity due to drought (Africa, Asia, America). Increased precipitation in high altitudes and decreased precipitation in subtropical areas.
• Water Resources and Flooding: Glaciers are melting rapidly, pouring water into rivers. This melting causes severe flooding, particularly in East Asia and the Middle East, endangering crops. Increased frequency of hurricanes.
• Biodiversity: Accelerated rate of species disappearance.
• Health: Diseases like Malaria affect more people due to changing climate zones.
• Human Displacement: Increased numbers of climate refugees.

Key Ecological Definitions

Biodiversity

The variety of living organisms present on Earth.

Ozone Layer Depletion

The ozone layer is responsible for filtering harmful ultraviolet radiation from the sun.

Biocapacity

The productive capacity of a given area to generate a regular supply of renewable resources and absorb consumption waste.

Ecological Footprint

A sustainability indicator that summarizes the total area required for each individual to produce the resources they use and to assimilate the waste they generate.