There are two main types of producers:
* Plants are the most common type of producer. They use the energy from the sun to convert carbon dioxide and water into glucose, which is a type of sugar. Plants use glucose for energy and to build new plant material.
* Algae are also producers. They are found in both fresh and salt water. Algae use the energy from the sun to convert carbon dioxide and water into glucose. Algae are used as food by a variety of organisms, including fish, shellfish, and seabirds.
Producers are essential to the ecosystem. They provide the food and energy that sustain all other organisms. Without producers, the food chain would collapse and all life on Earth would cease to exist.