The stick part of cattail can be used to drive away mosquitoes, but cattail sticks can only be used to drive away mosquitoes when they are dry and without moisture, and then we light them with an ignition tool. In the words of one thing in our daily life, it is mosquito-repellent incense lit in summer, and the smell of cattail in the air can drive away mosquitoes. Typha has no great demand for the environment in which it grows. Generally, places with serious environmental pollution grow well. Because people only pay attention to the rapid economic development, ignoring the cost of development is the destruction of the environment, but in fact people's awareness of environmental protection is not strong. In order to slow down the further deterioration of the environment, we can plant cattail around some heavy industrial factories, because cattail has good resistance to heavy metals and grows vigorously at the same time. Even in this environment, the growth rate of cattail has not been affected at all, and some chemicals in the sewage discharged from the factory can be purified, so planting cattail in a large area can be said to be recognized by most of us.