Most people think that humans only use plants for food like grains, fruits, and vegtables. However, we use plants for many things. We use plants for food, fibre, capturing carbon dioxide and giving out oxygen, and more. Let's break it down, I have already mentioned the food types that plants give us, next up is fibre, fibre is what is used mostly to make your clothes, it is also used to make paper and many other products, then we have capturing carbon dioxide, plants capture carbon dioxide as a part their phtosynthesis, in return they make oxygen and release it. Without plants, not only would we have a food shortage, but we would face a severe global crisis because of the increased amount of carbon emissions since no plant is collecting carbon dioxide.
Since early times, plants have been used as medicine from many tribes and nations. The first nations for one, had a very vast and large variety of medicinal plants that they used for healing purposes. Different plants have different medicinal uses, for example, morphine is a powerful pain killer, Opium poppies are the source of morphine. Almost all of medicine that had been created was form plants, even if its in the form of a pill, scientists use blueprints from plants like Opium poppies to create synthetic versions of them in pills or tablets.
Plants are raw materials for many products we own, one of the best examples is a house, it uses wood from trees, which are plants. Other examples include rubber, natural rubber is from the Brazillian rubber tree. Another example is coal or wood, coal and wood is used to heat up some homes. Some transportation is made of wood, for example a boat or a canoe. Some fuel is also from plants, like ethanol or methanol(also known as wood alchohol).