Jane Burston, founder and chief executive of Clean Air Fund, has been appointed an OBE for services to air quality.
The charity, which works to tackle global air pollution, has supported the implementation of schemes including the London Ultra Low Emission Zone (ULEZ).
Ms Burston, from Sevenoaks, said the honour was a “tribute to the incredible progress the clean air movement has made”.
Meanwhile, Ben Towers, from Gillingham, has been appointed an MBE for services to the startup business community, having set up his first company aged 11.
The now 27-year-old, who hired himself as an apprentice for his marketing and software development firm to stay in education at the same time, said the honour was an “amazing privilege”.