<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 several initiatives to reduce emissions and improve air quality, including implementing a Low Emissions Truck Program which encourages trucks to switch to cleaner burning engines; expanding public transportation options such as bus rapid transit and bike lanes; encouraging more people to use carpooling services; and investing in green infrastructure projects like trees and parks.