Electronics360: "Five Grand Challenges Engineers Face in the 21st Century"

I am seriously thinking that all gadgets need energy storage device. So energy storage has to be attended without polluting environment. Trees can store energy one day.

next important discovery has to be water from air. Hydrogen fusion will be the future of mankind

Would number 5 be for news to be complete and accurate or am I missing something?

I'm with hramalingam that energy from fusion should be number 5 (or maybe inserted at number 1).