What is the main effect of global warming?

The main effect of global warming is the heating up of the Earth, which leads to an enhanced greenhouse effect. This occurs when greenhouse gases, such as carbon dioxide and methane, accumulate in the atmosphere, trapping heat from the sun. As a result, global temperatures rise, causing significant changes in climate patterns, weather events, and melting ice caps.

This increase in temperature can lead to various environmental impacts, including rising sea levels, more frequent and severe weather events, and changes in ecosystems and habitats. The greenhouse effect is a natural process, but human activities have intensified it, leading to the global warming phenomenon we are currently experiencing.

The other options do not accurately describe the primary consequence of global warming. Rather than cooling, global temperatures are on the rise. Enhanced agricultural productivity might be a possible outcome in some regions, but it is not universally true and not a main effect of global warming itself. Additionally, global warming is causing the destabilization of many natural habitats, not their stabilization. Together, these contrasts highlight why the heating of the Earth through the greenhouse effect is the most accurate and encompassing description of global warming's main effect.