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Scientists say house dust could us fat. They say that people should their house clean if they want to putting on weight. The scientists are from Duke University in the USA. They some research on how dust affects mice. The researchers dust samples from 11 different houses and put them in the cells of mice. Dust from nine of the houses the mice fatter. The scientists said house dust the hormones in the mice that fat in their body. The scientists said that we in and swallow small amounts of dust. Researcher Dr Heather Stapleton said: "Amounts of dust as low as three micrograms… measurable effects."

The dust particles chemicals called EDCs. These can or copy the body's hormones. EDCs are in sofas and carpets to them fire resistant. They are also to some plastics, to make them bend more, and in cosmetics, food packaging, and household cleaning products. The researchers said EDCs are everywhere in most houses. They say the chemicals can our health, and that children are at a higher risk. EDCs also other health risks including creating learning disabilities in children. Studies have also that EDCs can the risk of cancer and infertility. The researchers said there was a "critical need" to things we make that can make us unhealthy.

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