In a typical mid-latitude location, incident solar energy averages around 200 W/m² over a 24-hour cycle. Compute the land area needed to supply the average person’s energy use of 200 MJ/day if solar panels convert a net 5% of the energy incident over a large area of land to useful electrical energy. Multiply by world population to get an estimate of total land area needed to supply the world energy needs from solar power under these assumptions. Compare this land area to some relevant reference areas – the Sahara Desert, your native country, etc.