Complex sentence: Production from the El Salvador would increase Chile's total output of copper about 450,000 tons of copper per year, rather than a decrease in production, out of satisfaction and relief, the company renamed the mine El Salvador, Spanish The Savior.
Split into simpler sentences: Production from the El Salvador would increase Chile's total output of copper about 450,000 tons of copper per year. Rather than a decrease in production, out of satisfaction and relief, the company renamed the mine El Salvador, Spanish The Savior.