GM crops can protect the environment because they are kinder to nature. Many farmers today depend on chemicals such as pesticider, herbicider, and fertilizer to make their crops grow. Through gene biology, the genes of plants can be modified so that they will be disease-resistant and pest-resistant and still produce the same amount. The most common GM crops grown at the moment are those that resist herbicides. The second most common are those crops that kill pests. Some crops have been grown with both those genes. If a crops can resist herbicides, the farmer can spray a field with herbicides with out harming the crops. All the weeds and other plants die, but the crops dose not.