Question

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Explanation:

Environmental advantages of recycling aluminum

1. Conserves natural resources (bauxite ore).
2. Reduces greenhouse gas emissions and landfill waste.

Economic advantages of recycling metals

1. Cheaper than extracting and refining raw metals from ores.
2. Creates jobs in recycling industries and reduces waste disposal costs.

Energy differences between recycling and extraction

1. Extraction requires breaking strong chemical bonds in metal ores (electrolysis/reduction).
2. Recycling only requires melting the existing metal, which requires much lower temperatures and energy.

Answer:

Question 1

1. Conserves bauxite ore (the raw material).
2. Reduces greenhouse gas emissions compared to primary production.

Question 2

1. Saves money because recycling is less expensive than mining and extracting new metal.
2. Reduces waste disposal costs and landfill fees.

Question 3

Extracting metals from ores requires breaking strong chemical bonds (e.g., electrolysis of aluminum oxide), which is highly energy-intensive. Recycling only requires melting the existing metal, which requires significantly less energy.