Historic time capsule found at Washington Monument. Before you go, we thought you'd like these... BALTIMORE (WBAL) -A piece of history has been discovered in Baltimore. The original cornerstone of the Washington Monument in Baltimore, thought to be long lost, was discovered last week while crews dug for a sewage tank.
We divide our energy use among four economic sectors: residential, commercial, transportation, and industrial. Heating and cooling our homes, lighting office buildings, driving cars and moving freight, and manufacturing the products we rely on in our daily lives are all functions that require energy.
The best way to get the energy is to use the sugars being produced in the leaves in cellular respiration which requires oxygen and releases carbon dioxide. Since roots are embedded in the soil, they cannot photosynthesize. But the roots are actively growing and using energy.