1.   Municipal incinerators were found to be a large source of dioxins.

2.   Among them was Daniel Lispi, who as an assistant to the mayor of Harrisburg, Pa., oversees environmental matters at the municipal incinerator there.

3.   As regional director, Humphreys was responsible for seeing that the city complied with state directives for upgrading municipal incinerators and building sewage-treatment plants.

4.   Philadelphia has repeatedly declined to pay for any cleanup, even though the ash came from municipal incinerators burning household garbage.

5.   They are studying how environmental pollutants, like mercury from municipal waste incinerators, affect developing brains.

6.   These sources included municipal waste incinerators, cement kilns, copper smelting and iron sintering plants.

7.   While hospital and municipal incinerators have mercury emission standards, the coal-fired plants never did.

8.   In addition, the researchers suggested less obvious sources of pollution, including bus stations, hospital and school chimneys, municipal incinerators and garages.