Complex sentence: The rate for water and wastewater was 3.7 yuan per cubic metre in 2008, which is the highest in China, and more than 30 times the 1991 price of 0.12 yuan.
Split into simpler sentences: The rate for water and wastewater was 3.7 yuan per cubic metre in 2008. This is the highest in China, and more than 30 times the 1991 price of 0.12 yuan.