Sunlight at the 45th parallel = 15 horsepower per square freaking foot. All we need to do is learn how to collect it.
I already said that atmospheric diffusion prevents it from ever being turned into electricity by PV cells. The other problem is 70% of the planets surface is water so we only have the remaining 30%. The top and bottom doesn't get nearly enough sunlight nor are there any population centers nearby. So now we're down to ~20% give or take. Now that energy number you mentioned is meaningless because it's missing a time value. Power is measured as energy over time, KWh instead of just kilowatt. The 15HP you mention at the hottest part of the world in the middle of the day, once it's one hour later or one hour before that number goes down. Average of 50% of the time you will be receiving 0% of power.
Like I said, no where close to enough to power just the USA much less the rest of the world, but thanks for showing everyone the scale of your ignorance of the issue.
Solar is a great way to reduce energy consumption of buildings, the hottest part of the day is also the highest electrical usage. Using solar panels would reduce the power drain and thus the peak / swing loads. The only two "green" power sources that can do base load are Hydro and Geothermal and both are very situational.