Only about % of the water on Earth is potable (suitable for humans to drink). Of this water that is potable, only about 30% is in the form of ground water.
On the surface of the planet only % of water is freshwater in the forms of lakes and streams.
Areas with low availability of drinking water are said to be water .
Ideas to reduce water stress in preparation for the anticipated shortages include:
→ pollution in rivers and lakes
→ using water conserving technology
→ perfecting desalination plants to process undrinkable water into drinkable fresh water

Photosynthesis converts light energy to chemical energy. which molecules are the end product of this transformation of energy in this reaction?

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of