What is earth blood?

Question

I heard of earth blood in a book and i really want to know what it is. It wasn't in the dictionary and when i looked it up on dictionary.com it came up with a load of rubbish and addresses.

Answer 1

Oil. All oil is natural.

“Blood of the Earth: The Battle for the World’s Vanishing Oil Resources” is a detailed account of the history of oil. It reveals that when states replaced coal with oil, they scrambled to meet an unprecedented global energy demand.

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Answer 2

oil  

Answer 3

Oil

Answer 4

never heard of it..  but plan b stated  oil  i bet thats what it is

Answer 5

Earths Blood, the source of all life is Water.