aluminium
Urea
three
Oxygen
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.
oxygen and sugar
oxygen and gluecose
three
1 brink = (¾+¼) brick = ¾ brick + ¼ brick If 1 brick balances ¾ brick + ¾ lb then: 1 brick = ¾ brick + ¼ brick = ¾ brick + ¾ lb → ¼ brick = ¾ lb (subtracting ¾ brick from both sides) → 1 brick = 3 lb (multiplying both sides by 4).
No
stuff like stuff
that's its yellow and filling