who are the world's street children?
An estimated 100 million children live and/or work on city streets in the developing world, a number equivalent to the population of Mexico and more than three times that of Canada.
The vast majority of the world's street children - approximately 75 percent, according to UNICEF - are working street children: They work on city streets during the day, but return home nearly every night.
The other 25 percent, known as children "of" the streets, work, sleep and live on Third World streets. Sleeping under bridges, in doorways and public plazas, they are often the victims of sexual abuse, violence and exploitation, and lack access to adequate health care, nutrition and hygiene.