57 countries<span> consider themselves a part of the British Commonwealth.
</span>Africa: Botswana, Cameroon, The Gambia, Ghana, Kenya, Lesotho, Malawi, Mauritius, Mozambique, Namibia, Nigeria, Rwanda, Seychelles, Sierra Leone, South Africa, Swaziland, Uganda, United Republic of Tanzania, Zambia Asia: Bangladesh, Brunei DarussaIam , India, Malaysia, Pakistan, Singapore, Sri Lanka
Caribbean and America: Antigua and Barbuda, The Bahamas, Barbados, Belize, Canada, Dominica, Grenada, Guyana, Jamaica, Saint Lucia, St Kitts, Saint Nevis,Saint Vincent, and The Grenadines, Trinidad, Tobago Europe: Cyprus, Malta, United Kingdom Pacific: Australia, Fiji, Kiribati, Nauru, New Zealand, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu
Answer:emf blackout (electro magnetic field) ,is a shielding technique that helps protects a person from harmful radiation of light,it makes someone sleep comfortably and peacefully
