Master Topic C6 of OCR Gateway Science A GCSE Chemistry (J248): sustainable metal extraction by phytomining and bioleaching and by recycling, life cycle assessment and recycling, crude oil and the alkane hydrocarbons, the fractional distillation of crude oil, cracking and the alkenes, the evolution of the Earth’s atmosphere, greenhouse gases and climate change, atmospheric pollutants from burning fuels, and producing potable water and treating waste water. Worked examples, required-practical method steps, exam tips and graded model answers for Foundation and Higher tiers.
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