Chemical herbicides are substances used to control or eliminate unwanted plants, commonly known as weeds. They work by targeting specific biological processes in plants, disrupting their growth and development. These herbicides can be selective, affecting only certain types of plants, or non-selective, killing all vegetation they come into contact with. Farmers and gardeners often use chemical herbicides to improve crop yields and maintain the health of their gardens. However, their use can raise environmental concerns, as they may affect soil health, water quality, and non-target plant species. Proper application and management are essential to minimize potential risks.