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.
When asked, in their own words, why they favor or oppose legalizing marijuana, people on opposite sides of the issue offer very different perspectives. But a common theme is the danger posed by marijuana: Supporters of legalization mention its perceived health benefits, or see it as no more dangerous than other drugs. To opponents, it is a dangerous drug, one that inflicts damage on people and society more generally.