Been getting into this topic fairly heavily recently being a geology, geography and science student. Its also really annoying when you look into it when you see the vast volumes of hydrocarbons being wasted due to the extraction of them being either too costly or too difficult to extract. For example coal (still widely used for power stations ect) can only be mined economicly when the seam is a certain thickness, or if the bed is below 5 degrees in orientation. Now in the year that we live in not enough development is being put into new technologies to solve there issues. Another example is that every day, each half of the plannet gets 6000 times of the current global electricity consumption, equal in energy power from the sun. Now that is a shitload! But not much is really being done to try to harness the power.
With most renewable energy sources, companies are trying to tackle the big picture. Yes, we need clean energy. Yes the global population is big. But building huge solar farms, wind farms, wave farms or hydroelectric plants isnt really going to meet the globals energy needs. The best way to combat it as a whole in my opinion is on a small scale, ie small domestic wind turbines, solar panels, solar heating, ground source heat pumps ect.
Just wait till everyone wakes up, smells the coffie, and nuclear power becomes the main power source.........