Frankincense from Oman is displayed during the Aromas Fragrance Fair in Warsaw, Poland, March 28, 2026. Multiple manufacturers of perfumes, aromatherapy products and essential oils took part in the event. (Photo by Jaap Arriens/Xinhua)

Visitors smell fragrance samples during the Aromas Fragrance Fair in Warsaw, Poland, March 28, 2026. Multiple manufacturers of perfumes, aromatherapy products and essential oils took part in the event. (Photo by Jaap Arriens/Xinhua)

Participants make their own fragrances at the Aromas Fragrance Fair in Warsaw, Poland, March 28, 2026. Multiple manufacturers of perfumes, aromatherapy products and essential oils took part in the event. (Photo by Jaap Arriens/Xinhua)

A visitor smells a fragrance sample during the Aromas Fragrance Fair in Warsaw, Poland, March 28, 2026. Multiple manufacturers of perfumes, aromatherapy products and essential oils took part in the event. (Photo by Jaap Arriens/Xinhua)

A visitor smells a fragrance sample during the Aromas Fragrance Fair in Warsaw, Poland, March 28, 2026. Multiple manufacturers of perfumes, aromatherapy products and essential oils took part in the event. (Photo by Jaap Arriens/Xinhua)