Complex sentence: One of the most omplex and controversic solution in the oil and gas industry are Produced, Flowback and Frack water, the amount of chemical frack water carries makes this water one of the most dangerous water for our planet.
Split into simpler sentences: One of the most complex and controversial sub-products in the oil and gas industry are Produced, Flowback and Frack water. The amount of chemicals frack water carries makes this water one of the most dangerous for our planet.