oxygen and sugar
no
The sun.
For plants to create food for themselves.
Mainly in the mesophyll cells in the leaves.
plant cells-leafs and with the energy of sunshine.
glucose
Phototsynthesis produces oxygen and glucose from water and carbon dioxide.
chloroplasts in the plant's cells
During photosynthesis, one molecule of glucose produces 6 molecules of oxygen as a byproduct.
The actual production of bikes will have the same byproducts as any other mechanical industry using the same materials, and riding a bike will have the same byproducts as any other way of getting exercise.
Urea
Oxygen