This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision | Next revision Both sides next revision | ||
|
en:natural-elements [2015/09/29 09:56] federico |
en:natural-elements [2015/09/29 09:59] federico |
||
|---|---|---|---|
| Line 23: | Line 23: | ||
| **[[Fossil fuels]]** play an important role in the economy, since they are extensively used to produce electricity, heat and motion. Fossil fuels are [[non renewable resources]], since they were produced naturally millions of years ago, and are not renewed after it's use. | **[[Fossil fuels]]** play an important role in the economy, since they are extensively used to produce electricity, heat and motion. Fossil fuels are [[non renewable resources]], since they were produced naturally millions of years ago, and are not renewed after it's use. | ||
| + | ===== See also ===== | ||
| + | [[en:perpetual-resources|Perpetual Resources]] | ||