Question

which of the following is a common engineering challenge associated with wind energy
high greenhouse gas emissions
limited availability of wind resources globally
excessive land use requirements
intermittency of wind supply

Explanation:

Wind energy is intermittent as wind does not blow constantly. Wind turbines generate electricity only when wind is blowing at appropriate speeds. Greenhouse gas emissions are low for wind energy. Wind resources are abundant globally. While land - use can be a concern, intermittency is a more fundamental engineering challenge in harnessing wind energy consistently.

Answer:

Intermittency of wind supply