You inhale inhalants and Amphetamines you can smoke, inject, or ingest.
If you have good cardio respiratory endurance, then you'll be able to do rigorous physical activity for longer amounts of time, because like other muscles in your body, the more you stretch them the stronger they get and the longer they would last.
Hope that helps and makes sense :)
Its true. The exact definition is "any substance or agent that tends to produce a <span>cancer." courtesy of dictionary.com</span>
Google website individllual or group
