[Answered] It is believed that ____________________ was used as the main source of energy for thousands of ...

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skymedlock

Hero Member
Posts: 561

on: Jul 21, 2018

It is believed that ___________________ _ was used as the main source of energy for thousands of years before other sources were developed.

Fill in the blank(s) with correct word

Question 2

What is the highest component of natural gas?

a. Propane c. Butane
b. Hydrogen sulfide d. Methane

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Marked as best answer by a Subject Expert

tofugiraffe

Sr. Member
Posts: 319

Reply #1 on: Jul 21, 2018

Answer to Question 1

fire

Answer to Question 2

D

skymedlock

Member
Posts: 561

Reply 2 on: Jul 21, 2018

Excellent

kilada

Member
Posts: 311

Reply 3 on: Yesterday

Gracias!

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