Humans get 3 needs that they depend on from the process of photosynthesis. Photosynthesis is a chemical process in which plants containing chlorophyll obtain energy from the sun and use carbon dioxide (CO2) and water (H2O) from the environment to convert sunlight into food (glucose), while creating oxygen (O2 ) and water (H2O) as by-products. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essayOne of the main products of photosynthesis is glucose. It is the source of carbohydrates such as cellulose and starch. It also produces fats, proteins and sugars such as maltose and sucrose. Plants require glucose for their growth and energy. All living people and animals on earth depend on fats, proteins and carbohydrates to obtain their energy, this is what makes this one of the reasons why photosynthesis is essential for life on earth. Another product of photosynthesis is the oxygen we need to breathe. The process of breathing keeps us alive and photosynthesis provides us with oxygen to breathe. The level of carbon dioxide in the environment largely depends on the process of photosynthesis because photosynthesis converts the carbon dioxide present in the air into oxygen which in turn we can breathe unlike carbon dioxide. The level of carbon dioxide depends on the number of plants and trees we have. A sharp increase or decrease in carbon dioxide levels can be harmful to the environment. Industrial revolutions and technical progress have led to the creation of too many factories, manufacturing houses, buildings, roads, etc., which cause the filling of enormous amounts of carbon dioxide. air and photosynthesis have a great impact on us in helping to remove carbon dioxide from the air. Please note: this is just an example. Get a custom paper from our expert writers now. Get a Custom Essay Photosynthesis is directly related to the life and survival of all other living things on earth. It not only provides oxygen, without which breathing and being alive would be difficult, but it also provides food and energy for everyone. Analyzing the above facts shows how photosynthesis plays a vital role in regulating the life cycle on Earth.