Which of the following effects is NOT associated with global warming?

Global warming is associated with a variety of environmental changes, primarily due to the increase in greenhouse gases in the atmosphere. One of the common misconceptions is related to sea levels. In fact, as global temperatures rise, polar ice caps and glaciers melt, leading to an increase in overall sea levels rather than a decrease.

The other effects listed are indeed associated with global warming. Increased ocean acidity occurs as the oceans absorb more carbon dioxide, leading to chemical reactions that lower pH levels. Melting polar ice caps is a direct consequence of rising temperatures, which is a critical indicator of climate change. More frequent extreme weather events, such as hurricanes, droughts, and heatwaves, have also been linked to higher global temperatures, which disrupt typical weather patterns.

Therefore, the option regarding the falling of global sea levels is not consistent with the trends observed due to global warming, making it the correct choice for this question.