The percentage of energy that is used to perform work, using fuels more efficiently makes energy resources last longer (Science)

Renewable resources of west and central africa include:

Which of the following is not a place where hydrogen can be found on earth? a. natural gas well b. atmosphere c. water d. mine

What did the native title act do? a. it recognized and protected aboriginal rights to land. b. it stated that aborigines were to be counted as part of the census. c. it established aboriginal languages as official. d. it granted aborigines suffrage.