Lead is a metallic element with atomic number 82. It is a dense, soft, malleable, ductile metal. Known for several thousand years, it has been widely used through history for example in plumbing by the Romans and many other societies since. Compounds are poisonous on ingestion.

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Did banning lead additives in petrol (gasoline) make a large contribution to lowering lead levels in people's blood?

There has been a renewed interest recently in the effects of low doses of lead especially in children (see this question, for example: Is lead exposure responsible for the rise and fall of violent ...
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Did lead poisoning contribute to the fall of the Roman Empire?

The Roman Empire used a lot of lead. It was important component of their plumbing (the english word itself is derived from the latin word for lead). They even used it to sweeten wine and in food ...
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Does lead used in electronics leach into the environment via landfill at detrimental levels?

Despite being one of the earliest metals exploited by man, lead is an environmental poison. If it gets into the body it causes a variety of acute and chronic symptoms and even low levels are thought ...