Here's how to care for an aloe vera of your own. About This Plant. There are hundreds of varieties of aloe plants, which are indigenous to Africa and a few neighboring areas. Aloes come in many varieties that range in size from a few inches to tree heights of 30 to 40 feet, in the case of the kokerboom (or quiver tree).
Marijuana smoke smoke contains a similar range of harmful chemicals to that of tobacco smoke (including bronchial irritants, tumor promoters and carcinogens) (Hoffmann et al, 1975).
Drugs classified in Schedule 1 are considered the most harmful substances with no medical benefits, and the rest descend from there: 1  Schedule 1: Examples of Schedule 1 drugs include Ecstasy, LSD, and Heroin. Marijuana is also considered a Schedule 1 drug despite several studies done on its medical benefits.