The pope also appealed for a renewed political commitment to fostering the stability of Lebanon, which he said "risks losing its identity and finding itself caught up even more in regional tensions" due to its economic and political crisis.
"It is most necessary that the country maintain its unique identity, not least to ensure a pluralistic, tolerant and diversified Middle East in which the Christian community can make its proper contribution and not be reduced to a minority in need of protection," he said.
"A weakening of the Christian presence risks destroying internal equilibrium and the very reality of Lebanon," he said. "Moreover, without an urgently needed process of economic recovery and reconstruction, the country risks bankruptcy, with the possible effect of a dangerous drift towards fundamentalism."
"It is therefore necessary for all political and religious leaders to set aside their personal interests and to commit themselves to pursuing justice and implementing real reforms for the good of their fellow citizens, acting transparently and taking responsibility for their actions."
This year will mark the 10th anniversary of the start of the Syrian war and the 20th anniversary of the Sept. 11 terrorist attacks on the United State, Pope Francis pointed out.
"How I wish that 2021 may be the year when the conflict in Syria, begun ten years ago, can finally end," the pope said, adding an appeal to the international community to "address the causes of the conflict with honesty and courage."
Pope Francis condemned terrorism, which he said has intensified in the last twenty years since the Sept. 11 attacks, particularly in sub-Saharan Africa.
He said: "The targets of these attacks are often precisely places of worship where believers are gathered in prayer. In this regard, I would like to stress that the protection of places of worship is a direct consequence of the defence of freedom of thought, conscience and religion, and is a duty incumbent upon the civil authorities, regardless of their political persuasion or religious affiliation."
The pope said that he also has been following with particular attention the deterioration of relations on the Korean Peninsula, the situation in the South Caucasus, and the political and social tensions in the Central African Republic.
He also expressed concern regarding the recent coup d'état in Myanmar, food insecurity in Yemen, and the displacement of peoples in Africa's Sahel region.
"The closing of borders due to the pandemic, combined with the economic crisis, have also aggravated a number of humanitarian emergencies, both in conflict areas and in regions affected by climate change and drought, as well as in refugee and migrant camps," Francis said.
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"I think especially of Sudan, where thousands of people fleeing the Tigray region have sought refuge, as well as other countries in sub-Saharan Africa, or in the Cabo Delgado region in Mozambique, where many have been forced to leave their own lands and now find themselves in highly precarious conditions."
Pope Francis said that he is hopeful that the next United Nations Climate Change Conference in Glasgow this November will lead to an effective agreement addressing the consequences of climate change.
He said that he could not fail to mention "the increased warming of the earth, which has caused devastating fires in Australia and California" and the floods in Vietnam and the Philippines.
"In Africa too, climate change, aggravated by reckless human interventions – and now by the pandemic – is a cause of grave concern. I think particularly of food insecurity, which in the last year has especially affected Burkina Faso, Mali and Niger, with millions of people suffering from hunger. In South Sudan too, there is a risk of famine," the pope said.
The pope ended his speech to the diplomats from around the world with a note on the pandemic's implications for religious freedom.
"Even as we seek ways to protect human lives from the spread of the virus, we cannot view the spiritual and moral dimension of the human person as less important than physical health," he said.