Compared to mars and venus, earths atmosphere has?

Compared to Mars and Venus, Earth's atmosphere is about 4/5 nitrogen and 1/5 oxygen.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.