Which is an effect of global warming? A. changing seasons every year. B. increasing greenhouse gas concentration in air. C. increasing carbon dioxide in the atmosphere. D. rising sea level over a period of time.

1 answer

D. rising sea level over a period of time.

While options B and C are causes of global warming, option D is an effect of global warming. Rising sea levels are caused by the melting of ice sheets and glaciers, as well as thermal expansion of seawater as it warms.