> Oil is primarily used as fuel for transportation. The use of the word "oil" tends to include gas too (and in many cases coal) as the word the press many time

> Oil is primarily used as fuel for transportation. The use of the word "oil" tends to include gas too (and in many cases coal) as the word the press many times doesn't use is hydrocarbons. Gas (be it natural gas, shale gas) is very much a source of electricity production, around one third of all gas is used for electricity... it's almost 100 in the case of coal. > What is the efficiency of this technology compared to the usual solar panels? It's mentioned in the video: traditional cells c. 30% vs 22%. A 1/3 loss in efficiency. But then, their use is more flexible. > How many square kilometers of that glass do we need to install to meet that demand? "Dividing the global yearly demand by 400 kW•h per square meter (198,721,800,000,000 / 400) and we arrive at 496,804,500,000 square meters or 496,805 square kilometers (191,817 square miles) as the area required to power the world with solar panels. This is roughly equal to the area of Spain. At first that sounds like a lot and it is. But we should put this in perspective." Source: http://landartgenerator.org/blagi/archives/127 http://landartgenerator.org/blagi/archives/127