Experts are meeting in Germany for U.N.-hosted talks on climate change amid growing pressure for governments to act faster against global warming.

Diplomats meeting in the western city of Bonn starting Monday will focus on resolving issues that couldn't be agreed upon at last December's climate summit in Poland. This includes the rules governing the international trade in carbon certificates, which allow rich countries to offset emissions by paying for projects in poor nations.

Public concern about global warming has heightened over the past year amid a series of extreme weather events. Students in Europe and beyond have staged regular street protests demanding action to curb climate change.

Britain's Prime Minister Theresa May during a visit to Imperial College where she saw machinery which converts carbon dioxide into oxygen, in London, Wednesday, June 12, 2019. Britain's outgoing prime minister on Wednesday announced plans to eliminate the country's net contribution to climate change by 2050 as Europe's effort to slow global warming picked up speed. (Stefan RousseauPool photo via AP)

Britain's Prime Minister Theresa May during a visit to Imperial College where she saw machinery which converts carbon dioxide into oxygen, in London, Wednesday, June 12, 2019. Britain's outgoing prime minister on Wednesday announced plans to eliminate the country's net contribution to climate change by 2050 as Europe's effort to slow global warming picked up speed. (Stefan RousseauPool photo via AP)

The meeting, which runs until June 27, precedes a September gathering of world leaders in New York to discuss climate change.

The University of Notre Dame president Fr. John Jenkins, a co-organizer of a Vatican summit on climate change, meets reporters, at the Vatican, Friday, June 14, 2019. CEOs of oil companies, including ExxonMobil, BP, Royal Dutch Shell, Total, Chevron and Eni, said in a joint statement Friday that governments should set such pricing regimes at a level that encourages business and investment, while "minimizing the costs to vulnerable communities and supporting economic growth." (AP PhotoAndrew Medichini)

The University of Notre Dame president Fr. John Jenkins, a co-organizer of a Vatican summit on climate change, meets reporters, at the Vatican, Friday, June 14, 2019. CEOs of oil companies, including ExxonMobil, BP, Royal Dutch Shell, Total, Chevron and Eni, said in a joint statement Friday that governments should set such pricing regimes at a level that encourages business and investment, while "minimizing the costs to vulnerable communities and supporting economic growth." (AP PhotoAndrew Medichini)