In most cases, primary food production occurs in a process called photosynthesis, which is powered by sunlight. In a few environments, primary production happens though a process called chemosynthesis, which runs on chemical energy. Together, photosynthesis and chemosynthesis fuel all life on Earth.
Eat 5 â 7 servings of meat and beans per day. This depends on the total number of calories you consume in a day. 1  If you consume 1600 â 1800 calories, eat 5 servings per day. 2  If you consume 2000 calories, eat 5 Â½ servings per day. 3  If you consume 2200 calories, eat 6 servings per day. 4  If you consume 2400 â 2600 calories, eat 6 Â½ servings per day.
A person who consumes 2,000 calories daily should eat about 5Â½ ounces of protein each day. You can get protein from seafood, lean meat and poultry, as well as eggs, beans and peas, tofu, nuts, and seeds. person who eats 2,000 calories daily should have 2 Â½ cups of vegetables a day. This might include a half-cup each of broccoli, tomatoes, cauliflower, and a sweet potato. Aim for lots of color on your plate as a way to get a variety of vegetables each day.