Wind
1. Is the energy source classified as non renewable, renewable or inexhaustible?
Inexhaustible
2. How is the energy source made usable?
It can create electricity by the use of windmills.
3. What are the infrastructure requirements for utilizing this energy source?
Windmill, turbine, generator. And you need it to be a tall structure so that wind can hit it without being blocked.
4. What emerging technologies will make this energy source safer, more usable, more efficient, cleaner..... etc?
A more efficient generator could convert more of the winds energy into electricity, or you could pitch the blades so that they can withstand higher speeds of wind.