input question: What is the missing first step of the following process: - Attach a rocket - Add rocket fuel - Launch rocket - Satellite goes into orbit.???
output answer: Build a satellite

input question: What is the missing first step of the following process: - Causes them to absorb aluminum from soil - The water runs off from the soil into lakes, streams, etc - Fish and their eggs die - Frogs and plants die - Insects and other wildlife die - The ecosystem is out of balance, causing further problems -???
output answer: Acid rain makes waters acidic

input question: What is the missing first step of the following process: - Engines produce carbon dioxide - Living things produce waste - Waste decomposes - Decomposition produces methane - Water evaporates - Water vapor joins the atmosphere - Carbon dioxide, water vapor and methane are greenhouse gases -???
output answer: People breathe and expel carbon dioxide

input question: What is the missing first step of the following process: - People burn coal for heat or electricity - Pollution from the coal goes into the sky - Coal pollution enters clouds - Clouds rain over an area - The polluted rain becomes acid rain.???
output answer:
People dig up coal from the ground