Write about the famous explorer who told people about China and their product.

Marco polo was among the first Europeans to describe many of the advance technologies found in China.

Marco Polo  was a Venetian merchant. explorer, and writer who travelled through Asia along the Silk Road between 1271 and 1295. His travels are recorded in The Travels of Marco Polo (also known as Book of the Marvels of the World and Il Million, c. 1300), a book that described to Europeans the then mysterious culture and inner workings of the Eastern world, including the wealth and great size of the Mongol Empire and China in the Yuan Dynasty, giving their first comprehensive look into China, Persia, India, Japan and other Asian cities and countries.

Explanation: Born in Venice, Marco learned the mercantile trade from his father and his uncle, Niccolò and Maffeo, who travelled through Asia and met Kublai Khan. In 1269, they returned to Venice to meet Marco for the first time. The three of them embarked on an epic journey to Asia, exploring many places along the Silk Road until they reached Cathay (China). They were received by the royal court of Kublai Khan, who was impressed by Marco's intelligence and humility. Marco was appointed to serve as Khan's foreign emissary, and he was sent on many diplomatic missions throughout the empire and Southeast Asia, such as in present-day Burma, India, Indonesia, Sri Lanka and Vietnam.As part of this appointment, Marco also traveled extensively inside China, living in the emperor's lands for 17 years and seeing many things that had previously been unknown to Europeans.

i think its toxic gasses but i could be wrong

we need the diagram to answer this correctly.