If water levels drop does the amount of water stay the same just in different forms

Which two nations are doing the most to combat their environmental issues?

According to the population pyramid, in 2000 china had about 120 million people in which age-group?

The mechanization of agriculture has resulted in all of the following excepta increased productionb. an increased ability to feed growing global populationsc. decreased erosion as a result of advanced planting machinesd. increased employment in the farming industry