Among the solutions to minimize the risks associated with the use of fossil fuels, the author suggests the:
Based on the meanings in the text, the option in which the two words are synonymous is:
In The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. (lines 1-3), due to can be substituted by:
According to paragraph 4 (lines 33-42), all the elements below result from the burning of fossil fuels, EXCEPT:
Concerning the figures relative to the year 2005, as mentioned in paragraph 2 (lines 11-22):
In To release their stored energy, fossil fuels must be burned. (lines 33-34) the expression in boldtype can be replaced by: