Number of combinations created in this step: 14

67. Plankton = Cells + Water
68. Mercury = Cinnabar + Fire
69. Acid Rain = Clouds + Nitric Acid
70. Flashlight = CuZn Battery + Lightbulb
71. Moss = Earth + Algae
72. Chemical Rubbish = Fire + CuZn Battery
73. HCL = Hydrogen + Chlorine
74. HNO2 = Hydrogen + NO2
75. Lead Oxide = Lead + Oxygen
76. Glowing Lightbulb = Lightbulb + Electricity
77. Sulfur Dioxide = Oxygen + Sulfur
78. Sodium Hydroxide = Sodium + Water
79. Fungi = Swamp + Algae
80. Liquid Oxygen = Water + Oxygen