Final answer:
A warmer atmosphere is likely to cause increased sea levels, more frequent and severe weather events like hurricanes, increased greenhouse gas emissions, and exacerbated water scarcity.
Step-by-step explanation:
Possible effects of a warmer atmosphere include a number of significant environmental changes. Increased sea levels are expected due to both the melting of glaciers and ice caps, and the thermal expansion of water as average ocean temperatures rise. This can lead to inundated shorelines and loss of islands. More frequent and severe weather events, including hurricanes, are projected due to the increased warmth and moisture in the atmosphere. However, an increase in global temperatures is likely to result in increased greenhouse gas emissions, not decreased, as warming can trigger further releases from natural sources are expected to exacerbate the problem by altering precipitation patterns and accelerating evaporation, contributing to drought in some regions.