The quantity of natural resources of the earth are

Minerals taken out of the earth are called

The process used to separate petroleum into different products is

What is found along with petroleum in some oil wells?

Which one of the following state has largest deposit of iron ore?

Which is the largest open pit copper mine in the world?

Which one of the following city has petroleum refinery?

Rocks are made up of

The big holes dug in the earth surface to take out minerals are called

Where is oil refinery located in Kerala?