The most widely used herb in the world is parsley, a green herb used in many dishes to add flavor. Parsley can also often be found in teas. There are 30 different kinds of parsley. The parsley leaves can destroy odor, so chewing it can ward off bad breath. Parsley is a crop, as well as a wild growth herb. Long ago, people chewed parsley to eliminate drunken-ness.Parsley is a healthy herb, and every teaspoon contains 3 calories, and 0.1 gram of fat total. Dry parsley has no flavor, while cooked parsley has loads. Parsley is available all seasons, 24/7, and can be bought fresh at many health food stores.
A banana is the world's largest herb. Although sometimes classified as only a fruit, it's actually also a herbaceous plant.
Chamomile is the most widely used herb for tea..
Anise, saffron, mint, cumin, poppy and datura
English
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English is the most widely used second language in the world. It is an official or widely spoken language in many countries, and is commonly used as a lingua franca for international communication in business, tourism, and diplomacy.
Caffeine is the most widely used psychotropic drug in the world. It is found in coffee, tea, energy drinks, and some medications. It is known for its stimulating effects on the central nervous system, improving alertness and reducing fatigue.
The most widespread firearm is by far and away the AK-47, but the most widely used weapon? probably a simple knife/machete
sulfuric acid
Oil
Nonmetals
Most likely a shrub, because most herbs are used for medical reasons.
Zaatar, or hyssop, is a native herb to Israel and used often.