Children show locusts in bottles in a field in Sanaa, Yemen, June 24, 2020. Hundreds of billions of desert locusts were seen swarming through the Yemeni Houthi-held capital Sanaa on Wednesday, invading crops and leaving farmers of the war-torn Arab country in despair. (Photo by Mohamed al-Azaki/Xinhua)

A child shows locusts in a bottle in a field in Sanaa, Yemen, June 24, 2020. Hundreds of billions of desert locusts were seen swarming through the Yemeni Houthi-held capital Sanaa on Wednesday, invading crops and leaving farmers of the war-torn Arab country in despair. (Photo by Mohamed al-Azaki/Xinhua)

A child shows a locust in a farm field in Sanaa, Yemen, June 24, 2020. Hundreds of billions of desert locusts were seen swarming through the Yemeni Houthi-held capital Sanaa on Wednesday, invading crops and leaving farmers of the war-torn Arab country in despair. (Photo by Mohamed al-Azaki/Xinhua)

Children catch locusts in a field in Sanaa, Yemen, June 24, 2020. Hundreds of billions of desert locusts were seen swarming through the Yemeni Houthi-held capital Sanaa on Wednesday, invading crops and leaving farmers of the war-torn Arab country in despair. (Photo by Mohamed al-Azaki/Xinhua)

Children catch locusts in a field in Sanaa, Yemen, June 24, 2020. Hundreds of billions of desert locusts were seen swarming through the Yemeni Houthi-held capital Sanaa on Wednesday, invading crops and leaving farmers of the war-torn Arab country in despair. (Photo by Mohamed al-Azaki/Xinhua)

Children catch locusts in a field in Sanaa, Yemen, June 24, 2020. Hundreds of billions of desert locusts were seen swarming through the Yemeni Houthi-held capital Sanaa on Wednesday, invading crops and leaving farmers of the war-torn Arab country in despair. (Photo by Mohamed al-Azaki/Xinhua)