In the 1980s Hammond demonstrated a device to monitor the health impacts of passive smoking. The nitrogen is desorbed from the filters and subsequently analysed using
gas chromatography. Her research and reporting to the
Federal government of the United States resulted in the
Federal Aviation Administration issuing a ban on smoking on aeroplanes. She also showed pregnant women who smoke transfer carcinogens through the placenta to their unborn children, increasing their risk factors for different cancers. At Berkeley Hammond leads the national ''Children's Health and Air Pollution study'', which looks to understand and minimise the risks of
air pollution on children's health in
Fresno, California. Fresno has been identified as one of the eight most polluted cities in the United States. Her work showed that there is a direct link between pollution and children's immune systems; and that
polycyclic aromatic hydrocarbon impacted
Regulatory T cell function. She has looked at whether air pollution impacts the risk of premature birth and birth defects, whether air pollution causes allergies, how it impacts metabolism and obesity and how transit patterns impact foetus development in pregnant women. Amongst her research programs, she studies the impact of lead on the levels of lead in construction worker's blood and the impact of agrochemicals on the health of farmers. She has shown that smoking
Hookah can be as damaging to the lungs as the smoking cigarettes.
Selected publications • • • She serves on the
World Health Organization study group on Tobacco Product Regulation. == Personal life ==