Published Sunday, 16 June 2013
Speaking on the eve of the G8, Dr Sentamu said the coming together of world leaders in the Co Fermanagh town provides an opportunity to send a powerful message.
"If we stop big companies dodging taxes in the two-thirds world, millions of people could free themselves from hunger," he told the gathering at St Macartin's Cathedral.
"Too many unscrupulous businesses and individuals manage to avoid paying the taxes they owe particularly in developing countries.
"They're dodging millions of pounds every day. Indirectly robbing the poor of education, health, food, employment and sustainable development."
The IF campaign is calling for G8 leaders to take action against world hunger by stopping tax dodgers and giving people in poor countries more control over their land.
We are at a tipping point. We could be the generation to ensure every boy and girl, man and woman receives justice, mercy and love, to live a dignified human life in company with others
Sunday's service came after 2,000 people attended a concert calling for change at Botanic Gardens in Belfast on Saturday.
"Transparency and accountability are vital in the global food system," Dr Sentamu said.
"Decisions that affect millions of people are made behind closed doors, without the participation of those affected. Corporates and governments must be more transparent about their affairs so that citizens can hold to account the powerful players in the food chain.
"These are big IFs, but if we persuade all our global leaders to make these happen, and IF they do, there really will be enough food for everyone."
Some of the issues raised are expected to be discussed at the summit in Co Fermanagh which takes place on Monday and Tuesday.
Prime Minister David Cameron will be joined by US President Barack Obama and Russian President Vladimir Putin at the Lough Erne Resort.
German Chancellor Angela Merkel, French President François Hollande, Japanese Prime Minister Shinzo Abe, Canadian Prime Minister Stephen Harper, and Italian Prime Minister Enrico Letta will also be in attendance.
© UTV News