ROME (AP) — More than 70 countries have pledged to do more to cut down on the amount of food lost due to poor refrigeration.

The countries signed the pledge Saturday at an annual meeting of the Montreal Protocol where ministers, government officials and experts work on regulating man-made chemicals used in refrigeration and air-conditioning systems that are harmful to the ozone layer. The meeting took place at the United Nations' Food and Agriculture Organization headquarters in Rome.

About one-third of the world's food is lost or wasted and the hope is that developing better methods to keep food cold while it's stored and transported will reduce waste.

Poor refrigeration leads to the loss of about 9% of perishable food in developed countries and about 23% in developing countries, where millions of people suffer from malnutrition.

Experts say better refrigeration would help reduce greenhouse gas emissions and the harmful gases used in refrigeration and air-conditioning systems.

The United States, China, European Union members and many nations in the Americas, Africa and Asia signed the pledge.

Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

More from this section

MILAN (AP) — The gala season premiere of Puccini’s “Tosca” starring Russian soprano Anna Netrebko and conducted by Riccardo Chailly received 15 minutes of applause from an audience of Milanese elite, in an evening that celebrated culture as a bulwark against political extremism.

LA PAZ, Bolivia (AP) — With its top leader absent, the party of Evo Morales gathered Saturday in the Bolivian city of Cochabamba to start choosing its candidates for new elections called after the resignation and exile of the former president amid protests over vote results.

Port-au-Prince (AP) — The flaming barricades are mostly gone, protesters have largely dissipated and traffic is once again clogging the streets of Haiti’s capital, but hundreds of thousands of people are now suffering deep economic aftershocks after more than two months of demonstrations.

STOCKHOLM (AP) — An astronomer who shares this year's Nobel physics prize for discovering a planet outside the Earth's solar system is taking issue with people who shrug off climate change on the grounds that humans will eventually leave for distant planets.