Agent Blue is a herbicide which contains the chemical compound copper(II) acetate. Some synonyms for Agent Blue include copper(II) acetate, bluestone or blue vitriol. Copper(II) acetate has been used in agriculture to control weeds and enhance crop yields. However, long term use of Agent Blue has been linked to increased soil acidity and copper toxicity. Due to its potential environmental hazards, the use of Agent Blue has been banned in many countries. Farmers now opt for more eco-friendly and sustainable herbicides that are safe for the environment. It is important for farmers to choose plant protection products that do not cause harm to the ecosystem and lower their carbon footprint.