Climate change is best described as?

• A. A local weather pattern.
• B. Rise in the average temperature of Earth due to a buildup of greenhouse gases.
• C. Destruction of the ozone layer.
• D. A temporary fluctuation in climate.

Answer: (B)

Climate change means long-term shifts in Earth's climate, not just short-term weather. The best description is a rise in the average temperature of the planet over time caused by a buildup of greenhouse gases in the atmosphere. These gases—like carbon dioxide from burning fossil fuels, methane from various sources, and other human-caused emissions—trap more heat and intensify the natural greenhouse effect, leading to a warming trend that lasts for decades. This sustained increase affects many parts of the system, including oceans, ice, weather patterns, and sea levels, which is why it's described as a long-term change rather than a simple weather event or temporary fluctuation. It’s also distinct from ozone depletion, which involves the thinning of the ozone layer and changes in UV exposure, and from local weather patterns that can vary day to day.