By Philip Pullella
VATICAN CITY, April 20 (Reuters) - Pope Francis, in his Easter address before a huge crowd, on Sunday denounced the "immense wastefulness" in the world while many go hungry and called for an end to conflicts in Syria, Ukraine and Africa.
"We ask you, Lord Jesus, to put an end to all war and every conflict, whether great or small, ancient or recent," he said in his "Urbi et Orbi" (to the city and the world) message.
Francis, marking the second Easter season of his pontificate, celebrated a Mass to an overflowing crowd of at least 150,000 in St. Peter's Square and beyond.
The crowd stretched back along all of Via della Conciliazione, the boulevard between the Vatican and the Tiber River.
Speaking under a sunny sky after a midnight rainstorm soaked the tens of thousands of flowers that bedecked the square, Francis weaved his message around the suffering of people across the globe.
He prayed to God to "help us to overcome the scourge of hunger, aggravated by conflicts and by the immense wastefulness for which we are often responsible".
Since his election as the first non-European pope in 1,300 years, Francis had made defence of the poor a hallmark of his papacy, often criticising developed nations and the excesses of capitalism and consumerism.
The 77-year-old pope, wearing white vestments for the service, prayed for the protection of those members of society who are particularly vulnerable to exploitation, abuse and abandonment - women, children, the elderly and immigrants.
Easter is the most important day on the liturgical calendar because it commemorates the day Christians believe Jesus rose from the dead after his crucifixion and the Church sees it as a symbol of hope, peace and reconciliation among peoples and nations.
BOLD PEACE NEGOTIATIONS
The pope called on the international community to "boldly negotiate the peace long awaited and long overdue" in Syria, where more than 150,000 people have been killed in the civil war, a third of them civilians. Millions have fled the country.
"We pray in a particular way for Syria, that all those suffering the effects of the conflict can receive needed humanitarian aid and that neither side will again use deadly force, especially against the defenseless civil population," he said.
Francis asked God to "enlighten and inspire the initiatives that promote peace in Ukraine so that all those involved, with the support of the international community, will make every effort to prevent violence and, in a spirit of unity and dialogue, chart a path for the country's future".
He also asked for an end to violence in Iraq, Venezuela, South Sudan and the Central Africa Republic.
Francis appealed for more medical attention for the victims of the deadly Ebola epidemic in Guinea Conakry, Sierra Leone and Liberia, and care for those suffering from many other diseases spread through neglect and dire poverty.
He called for a "halt to the brutal terrorist attacks" in f Nigeria, an apparent reference to Nigerian Islamist militant group Boko Haram, which earlier this month abducted some 130 girls from a school in the north of the country.
The Easter Sunday services were the culmination of four hectic days of Holy Week activities for the pontiff.
Next Sunday, he will canonise Pope John Paul II, who reigned from 1978 to 2005, and Pope John XXIII, who was pontiff from 1958 to 1963 and called the Second Vatican Council, a landmark meeting that modernised the Church.
Hundreds of thousands of people are due to come to Rome for the canonisations, the first time two popes are be made saints simultaneously and the first canonisations of a pope since 1954. (Reporting By Philip Pullella; Editing by Angus MacSwan)
So great were their numbers that they overflowed from sprawling St. Peter's Square, which was bedecked with row after row of potted daffodils, sprays of blue hyacinths and bunches of white roses. Waving flags from the pope's native Argentina as well as from Brazil, Mexico, Britain, Poland and many other countries, they also filled the broad boulevard leading from the square to the Tiber River.
Easter is the culmination of Holy Week and marks Christian belief that Jesus rose from the dead after his crucifixion.
Francis noted that this year the Catholic church's celebration of Easter coincided with that of Orthodox churches, which have many followers in Ukraine.
Francis prayed that God would "enlighten and inspire the initiatives that promote peace in Ukraine, so that all those involved, with the support of the international community, will make every effort to prevent violence."
In eastern Ukraine, the holiday was marred by a deadly shooting Sunday fueled by tensions between pro-Russian supporters in the east and those loyal to an interim government in Kiev. The clash appeared to defy an international agreement reached last week in hopes of ending months of unrest.
Francis also prayed that all sides in Syria will be moved to "boldly negotiate the peace long awaited and long overdue." Syria has been wracked by a three-year civil war that has cost 150,000 lives and forced millions to flee the country.
Christians make up about 5 percent of Syria's population. In comments to mark Easter there, the Greek Orthodox patriarch vowed that Christians there "will not submit" to extremists who attack "our people and holy places."
Francis makes a pilgrimage to Jordan, the Palestinian territories and Israel next month, so on Easter he prayed that hopes sparked by the resumption of Mideast peace negotiations will be sustained.
Thousands of pilgrims from around the world flocked to the celebrate Easter in the Holy Land, where Christian communities, as well as elsewhere in the Middle East, have been declining as the faithful flee regional turmoil.
Francis also spoke of those suffering in Africa from an epidemic of deadly Ebola and urged a halt to "brutal terrorist attacks" in parts of Nigeria.
Nigerians marked Easter with heightened security against a spreading Islamic uprising, mourning the deaths of 75 bomb blast victims and fearful of the fate of 85 abducted schoolgirls. The homegrown terror network Boko Haram has claimed responsibility for last week's rush-hour explosion in the capital, Abuja, and threatened more attacks.
In Venezuela, there have been hopes Vatican mediation can help end the country's violent political unrest, and Francis urged that "hearts be turned to reconciliation and fraternal concord" there.
But Francis' Easter message also urged people to pay attention to the needy close to home. He said the "good news" of Easter's joy means "leaving ourselves behind and encountering others, being close to those crushed by life's troubles, sharing with the needy, standing at the side of the sick, elderly and the outcast."
He denounced the "scourge of hunger," which he said was "aggravated by conflicts and by the immense wastefulness for which we are often responsible."
Francis has set an austere tone in his papacy, forsaking an ornate apostolic palace apartment for a simple guesthouse on the Vatican grounds and rejecting limousines for regular cars.
Cheering and applauding, the crowd tried to catch a glimpse of the pontiff as he circled around in his white popemobile before going to the basilica's balcony to deliver his commentary.
Reflecting the worldwide reach of the Catholic church, faithful read aloud prayers and passages from the Bible in Hindi, French, Chinese, German, Korean, Spanish, Italian and English.
Writers Michelle Faul in Lagos, Nigeria; Ian Deitch in Jerusalem and Yuras Karmanau in Bybasivka, Ukraine, contributed to this story.
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