Ejemplos de uso de DDT
1. Non–DDT compounds are used primarily, although DDT is being used in Zambia and on the island of Zanzibar.
2. The United States banned most uses of DDT in 1'72.
3. History South Africa had stopped using DDT in 1''6.
4. Both epidemics were stopped when DDT spraying resumed.
5. We need alternatives to chemical insecticides, especially DDT.