Hemp oil is a highly sustainable crop that, when grown without the use of harsh chemicals, can replace many commercial items with minimal impact on the environment.Hemp plants are naturally resistant to most pests, meaning they can be grown without the use of pesticides. Because hemp is an efficient bioaccumulator, it is important to avoid using chemical pesticides that can cause residual contamination of products. Toxic pesticides sprayed on hemp seeds plants can also leach into nearby soil and water sources, negatively impacting local biological environments. Hemp plants are known for growing very tall and in close rows, limiting the ability of weeds to establish themselves among hemp fields. Like with pesticides, many growers avoid using herbicides because they can affect local biological communities or be absorbed by hemp plants and transferred residually to commercial products.Approximately 30 countries currently grow hemp across Europe, Asia, and North and South America, including Germany, France, Denmark, the Netherlands, Canada, Chile, Japan, and South Korea, to name just a few.Efforts to legalize hemp crops were strengthened in 2014 when President Barack Obama signed the Agricultural Act, also known as the 2014 Farm Bill, into law.