C2a: The Structure of the Earth, C2b: Construction Materials, C2c: Metals and Alloys, C2d: Making Cars, C2e: Making Ammonia, C2f: Acids and Bases, C2g: Fertilisers and Crop Yield, C2h: Chemicals from Brine, C1a: Making Crude Oil Useful, C1b: Using Carbon Fuels, C1c: Clean Air, C1d: Making polymers, C1e: Designer Polymers, C1f: Cooking and Additives, C1g: Smells, C1h: Paints, C3a: Rates, C3d: Reacting MassesC3, C3e: Making Ammonia, C3f: Energy, C3g: Batch or Continuous, C3h: Allotropes.

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