Um, this rice is genetically modified so that it can be sprayed with smaller quantities of herbacides (not pesticides). Therefore, less herbicides enter the environment. If the rice is herbicide resistant it means that growers can apply more herbicide without killing the rice. It doesn't make the weeds around the rice less resistant to the herbicide (thus allowing less herbicide to be applied). This is just like Round Up Ready corn and bad for all the same reasons. On a different note, this will benefit third world countries about as much as the large donations of petrochemical fertilizers from the US did in the 70's; it will damage their environment and make them dependent on a third party supplier.