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Questions and answers on lead from the World Health Organization:What is lead? What is lead poisoning? What are the health effects of lead exposure? What are the costs associated with lead exposure? What are the sources of human exposure to lead? How important are used lead-acid batteries as a source of lead exposure? What is lead paint? Why is lead paint an important source of human exposure? What are the economic costs of lead paint? What is the Global Alliance

This factsheet compiles the latest information on the effects of lead on human health. It is presented in the 6 UN languages.The factsheet lists the Key Facts, and describes the Sources and routes of exposure, the Health effects of lead poisoning on children, and the WHO response. The factsheet also points to relevant related websites.

Pollination is the transfer of pollen between the male and female parts of flowers to enable fertilization and reproduction. The majority of cultivated and wild plants depend on animal vectors, known as pollinators, to transfer pollen. However, other means of pollen transfer such as self-pollination or wind-pollination are also important. Pollinators comprise a diverse group of animals dominated by insects, especially bees. More than 75% of the leading types of global good crops are visited by animal pollinators, such as