1. Research focused on certain principles like energy, light, the body, and earth
2.All of the above
Explanation: The Earth has a limited amount of fresh water meaning eventually the availability of water would be decline. In the future the technology that assist is desalinization process will be readily available on the market. Due to demand and supply law...persons will demand fresh water and will pay any price for water. [E.g. One liter of water may cost $50]