What are the two South American countries with no known oil reserves?
This site lists at least four South American countries with no known oil reserves.
http://www.eia.doe.gov/emeu/international/reserves.html
To find the answer to the question, you can refer to reliable sources that provide information on oil reserves in different countries. One such source is the Energy Information Administration (EIA) website, which is a trusted source of energy-related information.
To get the answer, you can visit the EIA website and search for their international reserves data. On the website, you can navigate to the section that provides information on South American countries' oil reserves. From there, you can identify the countries that have no known oil reserves.
In this specific case, you can visit the link provided: http://www.eia.doe.gov/emeu/international/reserves.html. This page will list the South American countries and their respective oil reserves data. By going through the information provided, you will find that there are at least four South American countries with no known oil reserves, as mentioned on the website.