Human activities can disturb natural ecosystems which is a human activity that can change local ecosystems

There are many way's we change local ecosystems one way is urbanization.

Explanation:

If the human race keeps building on more land ecosystems will die out and animals will become extinct.

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.

d. planting trees

the trees take in carbon to make oxygen.