The transportation sector emits 23% of all greenhouse gas emissions.
Solutions are to increase electric and hybrid car adoption, increase mass transit adoptions, and provide alternatives such as walking and biking.
Challenges are the development of sustainable batteries and a network of charging stations. For public transportation, walking and biking, infrastructure changes need to be made.
Impact: By adding more hybrid cars and electric vehicles and growing mass transit worldwide, over 20 gigatons of emissions can be avoided by 2050.