Nearly half the states now have laws legalizing recreational marijuana, with half of the general population and 41% of truck drivers now living in states where recreational marijuana use is legal.

Emissions testing laws are a crucial component in the fight against air pollution and climate change, yet these regulations vary significantly across the United States. Understanding these differences ...

The NCAA said last week that it is relaxing its policy for cannabis testing among collegiate athletes in the United States, while also recommending that it ease penalties for a positive test. The ...

Voters and politicians are reshaping America’s marijuana laws for the better. The possession and use of cannabis is now legal for medical purposes in 38 states and legal for adult recreational use in ...