In the airline industry elevation = height above ground and altitude = height above sea level. Altitude is used to calculate air pressure, elevation is used to make sure you don't crash into mountains.
Marijuana is a dangerous and addictive drug that has many consequences to using it. People debate whether it should be legalized or not due to its pros and cons. Marijuana should not be legalized because it is a gateway drug to the legalization of other drugs and has many bad effects on the users of it.
Growing marijuana, possessing marijuana, and using marijuana for recreational use (medical marijuana should be legal) should remain illegal, but the penalties for each of these violations should be altered drastically. This is a much more reasonable policy than full legalization.