Scientists have found that water shortage is possible in the next 80 years due to climate change and population growth.

The study authors argue that even efforts to more efficiently use water in municipal and

industrial sectors will be insufficient forprevent scarcity. The results show that reducing water use in agriculture is likely to play a major role in limiting water scarcity in the future.

The study not only gives a better guess about future water supply and demand, but also looks at what we can do to reduce the projected deficit.

Thomas Brown, US Forest Service (Rocky Mountain Station)

Researchers used various globalclimate models to look at future scenarios and how they can affect water supply and water demand. They also take into account population growth. Scientists used a water loss model to estimate the amount of water that would be available for use throughout the country, and modeled how this water would be supplied or stored in tanks for future use.

This study shows that changeClimate change and population growth can pose serious problems in some regions of the United States, especially in the central and southern parts of the Great Plains, in the southwestern and central states, including California, and also in some areas in the south.

The researchers found that the ongoingreducing per capita water consumption will not be enough to avoid impending water shortages due to the cumulative effects of population growth and climate change. The authors of the study examined various adaptive strategies to reduce predicted water shortages, such as increasing reservoir capacity, pumping more water from underground aquifers, and diverting more water from streams and rivers. An increase in reservoir size does not look promising to prevent water shortages, especially in those parts of the United States that are expected to become drier as the climate changes.

A further reduction in groundwater reserves couldwould help reduce future shortages in many areas, but with significant social and environmental costs. To avoid these costs, increasing the efficiency of irrigation should be a priority, and the further transfer of water from agriculture to other sectors will be important, the authors of the study believe. True, the study shows a general trend and did not consider every city, district and their environmental and economic conditions for water shortages.