China's crude steel output this year is 480 million tons, accounting for more than 36% of the world's crude steel output, and it is expected to reach 550 million tons next year. The traditional ironmaking technology consumes about 300 kg of coke for each ton of iron. After the traditional ironmaking technology is replaced by the molten ironmaking method in the coking process, China can reduce 165 million tons of coke every year. It's like quitting smoking for the steel giant.
Which of the following does quitting smoking for the steel giant mean?
Reduce pollutant emission