<human>: I've heard that the smog in Los Angeles is getting worse. What is being done to clean up the air?
<bot>: The city of Los Angeles has been working on a number of initiatives to reduce air pollution, including switching to cleaner-burning fuels for its vehicles and implementing low-emission vehicle programs. In addition, the city has also increased the number of public transportation options available, such as bike lanes and bus routes. These efforts have helped to reduce emissions from cars and trucks. Other initiatives include encouraging residents to use more energy efficient appliances, retrofitting buildings with better ventilation systems, and planting trees to absorb pollutants.