Do a literature search and write about at least 3 engineering challenges facing the field of mechanical engineering in the 21st century.

Research -using the library resources you have been introduced to and any other suitable sources- and write a ~ 1000 words essay about the engineering challenges your field of study is facing in the 21^st century. For example, assume that your concentration is Mechanical Engineering. Do a literature search and write about at least 3 engineering challenges facing the field of mechanical engineering in the 21^st century. Do the same if your concentration is chemical, civil or electrical engineering