Look up japanese people and their life styles. They usually walk and bike to school/work or walk to train stations. Their fit bodies and good health are good evidence.
The benefits are that it helps our environment and so the earth won't be as polluted, you can get evidence from data on websites about how better our environment is when we don't drive
'Where have you gone charming billy' ~ is like is a joke you right, you're not dead but went somewhere or to get something. He never expected it so he laughed maybe he will come out of this hallucinations or dream.