Global climate change may increase the number of worldwide famines by all of the following, except:

Global climate change is closely linked to various agricultural challenges that can lead to increased famines around the world. The correct answer highlights that requiring the use of alternate forms of energy does not directly contribute to an increase in famines.

While transitioning to alternate energy sources might be a necessary response to combat climate change, this shift does not inherently affect food production in the same way that the other options do. For instance, shifting types of crops due to changing climate zones can lead to reduced yields or crop failures if suitable varieties are not readily available. Increased droughts and extreme weather events can both devastate agricultural outputs, creating conditions in which food scarcity becomes more common. Therefore, the need for alternate energy is a matter of addressing climate change rather than a direct factor contributing to famine itself.