Use of new technologies will solve waste and sanitation challenges - Gita Welch The Acting UNDP Resident Representativein Ghana, Gita Welch says the use of new technologies; particularly social media will complement national initiatives at solving the waste and sanitation challenges. Miss Welch explained that the useful contributions by the public on social media will help mobilise, educate, and sensitise the public to issues of sanitation and waste management in the country. GBC