Everything comes from the sun. We have to have it to keep us alive. Many things are solar powered. It needs to be given in an adequate amount, with of course the occasional complete cloud cover. The sun will shine on some part of the earth at all times, until the sun dies, which is not expected for 5 billion years.
Ethanol comes from corn.
It burns hotter and is most commonly used in the Midwest of the United States. Iron is mainly produced in North America and in Europe. Other materials are used to help keep our resources thriving. People may use more of one, that is more common in their area, if the ones that are scarce cannot be found in their area. A World Regional Geography .