First lady of Ukraine Olena Zelenska, left, and EU Commission President Ursula von der Leyen attend a session at the World Economic Forum in Davos, Switzerland, on Tuesday. Markus Schreiber/Associated Press

DAVOS, Switzerland — Ukraine’s first lady on Tuesday pressed world leaders and corporate executives at the World Economic Forum’s annual gathering to do more to help her country at a time when Russia’s invasion is leaving children dying and the world struggling with food insecurity.

As the anniversary of the war nears, Olena Zelenska said parents in Ukraine are in tears watching doctors trying to save their children, farmers are afraid to return to their fields filled with mines and “we cannot allow a new Chernobyl to happen,” referring to the 1986 nuclear disaster as Russian missiles have pounded Ukrainian energy infrastructure for months.

“What you all have in common is that you are genuinely influential,” Zelenska told attendees. “But there is something that separates you, namely that not all of you use this influence, or sometimes use it in a way that separates you even more.”

She spoke as hundreds of government officials, corporate titans, academics and activists from around the world descended on the resort town. The weeklong talkfest of big ideas and backroom deal-making prioritizes global problems such as hunger, climate change and the slowing economy, but it’s never clear how much concrete action emerges to help reach the forum’s stated ambition of “improving the state of the world.”

“We are all internally convinced that there is no such global problem that humanity cannot solve,” Zelenska said. “This is more important now when Russia’s aggression in Europe poses various challenges.”

The fighting has killed thousands of civilians, displaced millions and jolted food and fuel markets worldwide, raising inflation and expanding food insecurity in developing nations.

“There is a right to food that every human being has, and it’s an insult for mankind and for human nature itself, that in the 21st century, it is possible for us to have mass starvation simply because because there is a targeted aggression of some countries,” she said.

Ukraine and Russia had been key suppliers of wheat, barley and other food supplies to Africa, the Middle East and Asia, where many were already going hungry. The head of the U.N. World Food Program says 350 million people worldwide are on the brink of starvation because of conflict, climate change and COVID-19, whereas it was about 80 million when he took the job in 2017.

“You think you can’t get any worse. Then the breadbasket of the world is shut down: Ukraine. Now (the country has) the longest bread lines in the world,” WFP Executive Director David Beasley told the Associated Press at Davos.

European Commission President Ursula von der Leyen urged the executives and leaders at Davos to keep aiding Ukraine.

“It is a perfect opportunity to take investment and reform to pave this way for Ukraine towards the European Union,” she said. “And my call on you is: We need every helping hand on board. Ukraine deserves to have as much support as possible.”

While urging unity for Ukraine, the head of the EU’s executive arm unveiled a major clean tech industrial plan to compete with China and the United States as the 27-nation bloc looks to remain a leader on plotting a greener future.

She said the plan would make it easier to push through subsidies for green industries and inject funding into EU-wide projects to help reach a 2050 goal of climate neutrality. The bloc also would be more forceful in countering unfair trading practices.

Instead of trade disputes, Chinese Vice Premier Liu He focused on his optimistic vision for a rebound of the world’s second-largest economy after strict COVID-19 measures. He spoke at Davos after China released data Tuesday showing economic growth fell to its second-lowest level in at least four decades last year.

“If we work hard enough, we are confident that in 2023, China’s growth will most likely return to its normal trend. The Chinese economy will see a significant improvement,” said Liu, a senior economic official on China’s Cabinet.

Scores of notables, including former U.S. Vice President Al Gore, trudged through the snow and crisscrossed the Alpine town of 10,000 to attend panels on everything from the environment to cryptocurrencies to the fight against COVID-19.

Many minds were on the devastating Russian missile strike that hit an apartment building in the southeastern Ukrainian city of Dnipro, killing dozens of people in one of the deadliest single attacks in months.

Zelenska said “there are no day offs from war” and that “everyone in Ukraine has to risk their lives every day,” but added that she believed the world would unify for peace.

Her husband, President Volodymyr Zelensky, will be beamed in by video Wednesday to complement the in-person delegation of his wife and officials such as Minister of Digital Transformation Mykhailo Fedorov.

Davos offers a new chance for Ukrainian envoys to ramp up international support for donations of weapons like tanks and anti-rocket defenses and greater pressure to further isolate and squeeze Russia’s economy.

France, the U.K., the U.S. and other nations are vowing to send increasingly powerful weapons to Ukraine, such as tanks or armored combat vehicles.

Finnish Prime Minister Sanna Marin, whose country borders Russia and is looking to join NATO, said the West should send Russian President Vladimir Putin the message that “we will support (Ukraine) as long as needed – five years, 10 years, 15 years, whatever it takes – we will support Ukraine, and this will not stop.”