A cafe-restaurant staff stands outside as people drink coffee in Monastiraki district of Athens, on Monday, May 25, 2020. Greece restarted regular ferry services to its islands Monday, and cafes and restaurants were also back open for business as the country accelerated efforts to salvage its tourism season. (Photo by Petros Giannakouris/AP Photo)

Nursery plants are seen placed in people's seats during a rehearsal as Barcelona's Gran Teatre del Liceu opera reopens its doors with a concert for plants, to raise awareness about the importance of an audience after the coronavirus lockdown, in Barcelona, Spain on June 22, 2020. The Gran Teatre del Liceu reopens its doors, in which the 2,292 seats of the auditorium will be occupied on this occasion by plants. It will be on 22 June, broadcast live online, when the UceLi Quartet string quartet performs Puccini's “Crisantemi” for this verdant public, brought in from local nurseries. (Photo by Nacho Doce/Reuters)

People practice yoga on a cliff at an attitude of over 2,000 meters at Laojunshan mountain to welcome upcoming International Yoga Day on June 20, 2020 in Luoyang, Henan Province of China. (Photo by VCG/VCG via Getty Images)

A man exercises in the early morning on a hilltop overlooking Kabul, Afghanistan March 3, 2016. (Photo by Mohammad Ismail/Reuters)

A child sleeps under a table at the Jorkpan market in Sinkor district in Monrovia, Liberia on May 2, 2016. (Photo by Marco Longari/AFP Photo)

A woman walks past a mural painting on a street in Tokyo, Japan on Wednesday, April 25, 2018. (Photo by Koji Sasahara/AP Photo)

A participant with a face painted as popular Mexican figure “Catrina” attends the Day of the Dead event at a National house for Mexican fans in central Moscow, a host city for the 2018 FIFA World Cup, Russia June 29, 2018. (Photo by Sergei Karpukhin/Reuters)

A woman cools off from the extreme heat from an opened fire hydrant in Brooklyn, New York on July 2, 2018. The highest temperature reached 35 degrees Celsius in New York City on Monday as a result of a prolonged heat wave. (Photo by Shannon Stapleton/Reuters)