If electronic devices are not properly disposed of, the toxic materials contained in them can get into our food and water supplies. Arsenic is common in electronic devices, particularly in television screens and monitors. The International Agency for Research on Cancer (IARC) claims that here is enough evidence to conclude that “arsenic and arsenic compounds” can cause cancer in humans. The World Health Organization (WHO) has set a provisional guideline value of 10 µg/litre for arsenic in drinking-water.