Provide a short summary of the general flow of illegal drugs throughout the world, both type and region.

arijuana is the most widely used illegal drug in the world, with an estimated 188 million users in 2019. Cannabis is most popular in North America and Europe, but its use is growing in other regions, such as Africa and Asia. Opioids, such as heroin and prescription painkillers, are the second most commonly used type of illegal drug. In 2018, an estimated 35 million people used opioids globally. Opioid use is highest in North America and Europe, but the number of users is growing in other regions, such as Asia and Africa. Cocaine is the third most commonly used illegal drug in the world, with an estimated 18 million users in 2019. Cocaine is most popular in North America and Europe, but its use is growing in other regions, such as Africa and Asia. The nine major categories of transnational organized crime are: 1. Drug trafficking 2. Human trafficking 3. Arms trafficking 4. Wildlife trafficking 5. Timber trafficking 6. Money laundering 7. Fraud 8. Cybercrime 9. Corruption I consider drug trafficking, human trafficking, and arms trafficking to be the most serious categories of transnational organized crime, because they involve the illegal trade of products that can be harmful to people and animals.