The major source of carbon which is released in the atmosphere by human beings comes from human activities such as burning of petroleum products such as oil, gas and coal and through deforestation as well.
Nearly, deforestation of 1 acre causes release of 3 metric tons of carbon dioxide in air. Like burning of coal causes global warming due to heat entrapping by carbon dioxide (termed as greenhouse effect)
Active transport proteins use adenosine triphosphate (ATP), the cell's energy storage molecule, to pump glucose into the cell, either with or against the concentration gradient.
