Environmental History and Atmospheric Challenges

1.2 Concern for the Environment

From the 1950s and 1960s, concern for the environment began to increase. Initially, scientists and biologists led the movement, followed by the emergence of NGOs that raised awareness about these critical issues. Growing public concern eventually compelled politicians to implement measures to mitigate environmental degradation.

• Stockholm Conference: The United Nations Conference on the Human Environment held in Stockholm began the formal analysis of these global problems.
• 1992 Earth Summit: Held in Rio de Janeiro, this summit reviewed studies conducted by designated groups since 1972 and introduced the concept of sustainable development.
• 1997 Kyoto Summit: Attended by 163 countries, this summit resulted in the Kyoto Protocol. The agreement aimed to reduce greenhouse gas emissions, though implementation has faced challenges, and targets for 2012 were not fully met by all industrialized nations.

2. Environmental Issues

2.1 Problems of the Atmosphere

Climate Change: Throughout history, the Earth has experienced climatic variations. While this is a natural process, the Industrial Revolution—particularly after 1820—has significantly accelerated these changes. Industries contribute heavily to the emission of polluting gases into the atmosphere.

This warming is primarily due to the greenhouse effect, where gases like CO₂ remain in the lower layers of the atmosphere, trapping solar heat that would otherwise escape into space. This heating causes several severe consequences:

• Melting Ice and Snow: Over the last 30 years, 20% of the North Pole ice has vanished; it is projected that there may be no summer ice by 2070.
• Heat Waves: Abrupt temperature spikes lasting 3 to 4 days are becoming more frequent due to global warming, posing significant health risks to the elderly, infants, and those with cardiovascular conditions.
• Increased Droughts: Prolonged dry periods lead to reduced plant cover and an increased risk of wildfires, leaving the soil highly susceptible to erosion.