“The time has come for a change in direction. Let us not rob the new generations of their hope in a better future,” he said in a video message for a global summit.

Pope Francis was one of about 75  leaders who contributed to the Climate Ambition Summit, which was held online Dec. 12, the fifth anniversary of the Paris Agreement on climate change.

The leaders renewed or strengthened investment pledges and commitments to cut greenhouse gas emissions and achieve carbon neutrality.

In his message, Pope Francis said everyone has a responsibility “to promote, with a collective commitment and solidarity, a culture of care, which places human dignity and the common good at the centre.”

That means there are some measures that can no longer be postponed, he said, including implementing strategies to reduce net emissions to zero.

Vatican City State will work to reduce net emissions to zero by 2050 and it will continue to strengthen and expand its efforts toward greater energy efficiency, improved resource management, sustainable transportation and waste management, and reforestation.

The Holy See also is committed to promoting a greater understanding of integral ecology, he said.

“Politics and technology must unite behind an educational process which favours a cultural model of development and sustainability focused on fraternity and an alliance between human beings and the environment,” he said.

Cardinal Peter Turkson, prefect of the Vatican Dicastery for Promoting Integral Human Development, said more must be done to help the poor and the planet.

“God has entrusted us with this planet and its wonderful resources,” he wrote.