Global warming driver — principal cause of progressive surface warming The progressive warming of Earth’s surface is mainly attributed to which factor?

Introduction / Context:
Global warming refers to the long-term upward trend in Earth’s average surface temperature. Understanding the primary driver is essential for environmental management and policy.

Given Data / Assumptions:

• We compare several environmental issues and sources.
• The question targets the main physical mechanism, not just specific sources.

Concept / Approach:
Carbon dioxide and other greenhouse gases absorb outgoing longwave (infrared) radiation and re-emit it, creating a “blanketing” effect that warms the lower atmosphere and surface. While many activities (e.g., fossil fuel combustion, deforestation) influence concentrations, the greenhouse effect mechanism of CO2 is the central cause of progressive warming.

Step-by-Step Solution:

Verification / Alternative check:
Climate assessments attribute the majority of observed warming to anthropogenic greenhouse gases, with CO2 being the largest single contributor to radiative forcing.

Why Other Options Are Wrong:

Common Pitfalls:
Mixing sources with mechanisms; the correct answer emphasizes the physical greenhouse effect.

Final Answer:
blanketing effect of CO2 in the atmosphere.