Eco Test Preparation Course Lecture 3: History of Environmental Issues — From Pollution to Global Challenges

Eco Test Strategy: Rebuilding Society and the Environment (15 Lectures Total)

Lecture 3: History of Environmental Issues — From Pollution to Global Challenges

—Humanity's journey of turning tragedy into lessons, and the new threat of "plastic"

The significance of studying the history of environmental issues is not merely to reminisce about the past. In the exam, the history section asks for highly practical knowledge, requiring you to answer sets of "causative substances, sources, impacts, and enacted laws."

We will dissect in detail during this lecture how the negative legacy of "pollution" that Japan once experienced became the foundation for modern, strict environmental regulations, and the process by which these problems expanded from "regional" to "global" scale.

1. The Origin of Japan's "Pollution": Organizing the Four Major Pollution Diseases

In the shadow of its rapid economic growth, Japan experienced severe pollution unparalleled in the world. For the exam, you must accurately match the causative substances and locations for the following four cases.

1. Kumamoto Minamata Disease (Officially confirmed in 1956)

• Location: Around Minamata Bay, Kumamoto Prefecture.

• Causative substance: Methylmercury (organic mercury).

• Source: Wastewater from the Chisso Minamata factory.

• Mechanism: Ingesting mercury concentrated through fish and shellfish caused severe damage to the central nervous system.

2. Niigata Minamata Disease (Agano River organic mercury poisoning: Confirmed in 1965)

• Location: Agano River basin, Niigata Prefecture.

• Causative substance: Methylmercury.

• Source: Wastewater from the Showa Denko Kanose factory.

• Key point: The fact that "Minamata disease was not a one-time tragedy" had a major impact on society at the time.

3. Itai-itai Disease (Certified as pollution in 1968)

• Location: Jinzu River basin, Toyama Prefecture.

• Causative substance: Cadmium.

• Source: Wastewater from the Mitsui Mining & Smelting Kamioka Mine.

• Symptoms: Bones become brittle, leading to tragic fractures from even the slightest impact. This was the first case to be officially recognized as a pollution-related disease in Japan.

④ Yokkaichi Asthma (1960s–)

• Location: Yokkaichi City, Mie Prefecture.

• Causative agent: Sulfur dioxide (SO2).

• Source: Smoke emissions from petrochemical complexes.

• Key point: While the three cases mentioned above were caused by oral ingestion (food/water), this was caused by air pollution (inhalation).

【Exam Essential: Basic Act for Environmental Pollution Control】 In response to these tragedies, the "Basic Act for Environmental Pollution Control" was enacted in 1967. This was superseded in 1993, leading to the current "Basic Environment Act." This historical progression is a staple of the exam.

2. From "Savior" of Pollution Control to "Global Challenges"

Entering the 1970s, the perception of pollution shifted from a domestic issue to a "global challenge" that transcends national borders.

1972: UN Conference on the Human Environment (Stockholm)

• Slogan: "Only One Earth"

• Outcome: Adoption of the "Declaration on the Human Environment." Additionally, UNEP (United Nations Environment Programme), the UN agency responsible for environmental issues, was established.

• Background: This was the first international conference to discuss both pollution in developed countries and environmental destruction caused by poverty in developing countries.

1992: Earth Summit (UN Conference on Environment and Development: Rio de Janeiro)

One of the most important years for the Eco Certification exam.

• Slogan: "Sustainable Development"

• Key Achievements:

  1. Agenda 21: An action plan for achieving sustainable development.

  2. Rio Declaration: Principles concerning development and the environment.

  3. UN Framework Convention on Climate Change, Convention on Biological Diversity: Signatures began at this summit.

3. A Success Story in Ozone Layer Protection: The Montreal Protocol

In history, the only event said to be a "human success" is the protection of the ozone layer.

• Causal substances: CFCs (chlorofluorocarbons, etc.).

• 1985: Vienna Convention (framework for protection).

• 1987: Montreal Protocol (specific reduction schedule).

• Present: As a result of strict regulations, the ozone layer is predicted to recover by the end of this century. The current international situation involves attempting to apply this "success model" to climate change countermeasures.

4. A New Threat: The History of Plastic Pollution and "Silent Spring"

In the 1960s, one book shook the world: Rachel Carson's "Silent Spring".

From Pesticides to Plastics

"Silent Spring" accused the abuse of insecticides (such as DDT) of silencing birds and destroying ecosystems. This is the origin of modern "chemical substance management." And now, that focus has expanded to "plastics."

• History of plastic: Production volume skyrocketed along with the "Great Acceleration" in the mid-20th century. The cheap and convenient magic material became a "negative legacy" that does not decompose for hundreds of years.

• Microplastic problem: Fine plastics 5mm or smaller. Not only their impact on marine life, but the fact that they are being ingested into the human body through the food chain has become a major concern in recent years (latest exam scope).

5. History of Waste Management: From Illegal Dumping to Circulation

Japan was once a society of "mass production, mass consumption, and mass disposal."

• 1970 (Pollution Diet): Enactment of the Waste Management and Public Cleansing Act. Initially, the goal was simply 'proper disposal (throwing things away).'

• 1990s: Large-scale illegal dumping incidents in Teshima (Kagawa Prefecture) and on the border of Aomori and Iwate Prefectures were uncovered.

• 2000: Enactment of the Basic Act for Establishing a Sound Material-Cycle Society. This marked a paradigm shift from 'throwing away' to 'circulating as resources.'

6. Lecture 3: Final Review for Success (Memorization Points)

History questions often use 'names' and 'years' as traps. Please master the following sets perfectly.

1. Cadmium = Itai-itai disease (Toyama)

2. Methylmercury = Minamata disease (Kumamoto/Niigata)

3. 1972 = Stockholm (United Nations Conference on the Human Environment)

4. 1992 = Rio de Janeiro (Earth Summit)

5. Rachel Carson = 'Silent Spring'

🏛️ Professor's Afterword

Studying history reveals that humanity has consistently repeated the pattern of 'acting only after suffering the consequences.' It was because of the tragedy of Minamata disease that wastewater regulations were established, and it was because of illegal dumping that recycling advanced.

However, modern issues like 'climate change' and 'plastic pollution' are approaching an 'irreversible tipping point' where it will be too late to act after suffering the consequences. That is precisely why we must learn the 'precautionary principle' now.

Next time, Lecture 4: The Road to Carbon Neutrality. We will finally dive into the most critical area of the exam: the front lines of climate change. Are you ready?