EVERYDAY SCIENCE

Detailed explanation-1: -Although freshwater is considered a renewable resource, the use of freshwater in some regions exceeds the ability of natural processes to replenish supplies. When the demand for freshwater cannot be met, it can lead to political tension and public-health problems.

Detailed explanation-2: -Renewable freshwater (surface and groundwater) resources are replenished by precipitation (less evapotranspiration) that ends up as runoff to rivers and recharge to aquifers (internal flow), and by surface waters and groundwater flowing in from neighbouring countries (inflow).

Detailed explanation-3: -Renewable resources include biomass energy (such as ethanol), hydropower, geothermal power, wind energy, and solar energy. Biomass refers to organic material from plants or animals. This includes wood, sewage, and ethanol (which comes from corn or other plants).

Detailed explanation-4: -Natural sources of fresh water include surface water, under river flow, groundwater and frozen water. Artificial sources of fresh water can include treated wastewater (wastewater reuse) and desalinated seawater.

Detailed explanation-5: -Water is a renewable resource when properly managed and used responsibly. Water circulates in nature in numerous states of matter, including liquid, vapour, and ice. As a result, the water that evaporates returns to the earth in the form of rain. As a result, water becomes a renewable resource.