Major environmental problems are, in fact, the manifestations of degraded environments at a global level. These problems include:

A. Air and water pollution
B. Increase in the number of wildlifes
C. Ozone layer depletion
D. Global warming
E. Climate change

Choose the correct answer from the options given below:

Correct option is A

Global environmental issues arise due to natural and human-induced factors that lead to climatic and ecological changes. The following are major global problems:

1. Air and Water Pollution (A) → Global and Local Issue

   • Caused by industrial emissions, sewage, and chemicals.
   • Leads to acid rain, waterborne diseases, and ecosystem damage.

2. Ozone Layer Depletion (C) → Global Issue

   • Caused by CFCs (Chlorofluorocarbons) and halons.
   • Leads to ozone holes, increasing exposure to UV radiation.
   • Controlled by the Montreal Protocol (1987).

3. Global Warming (D) → Global Issue

   • Caused by greenhouse gas emissions (CO₂, CH₄, NO₂).
   • Leads to melting glaciers, sea-level rise, and extreme weather events.

4. Climate Change (E) → Global Issue

   • Long-term alteration in temperature and weather patterns.
   • Caused by deforestation, industrialization, and fossil fuel burning.
   • Addressed under the Paris Agreement (2015).

Thus, the correct sequence is:
A (Air and Water Pollution), C (Ozone Layer Depletion), D (Global Warming), E (Climate Change)

• The increase in wildlife numbers is not necessarily an environmental problem.
• Wildlife can increase due to conservation efforts, which is a positive outcome, not a degradation issue.
• However, imbalanced population growth of certain species due to predator loss can cause ecological disruptions, but this is not classified as a major global issue.