Consider the following statements: 1. On the planet Earth, the fresh water available for use amounts to about less than 1% of the total water found. 2. Of the total fresh water found on the planet Earth 95% is bound up in polar ice caps and glaciers. Which of the statements given above is/are correct?

1. The Global Hydrological Cycle (basic)

Welcome to your first step in mastering world physical mapping! To understand how the world looks and functions, we must start with its lifeblood: Water. The Global Hydrological Cycle (or Water Cycle) is a closed system where the total amount of water remains constant, but its form and location are in a state of perpetual movement. Driven primarily by solar energy, water moves between the atmosphere, the oceans, and the land through several critical transitions. Physical Geography by PMF IAS, Hydrological Cycle (Water Cycle), p.325

The cycle begins when the sun heats the Earth's surface, causing evaporation from oceans and transpiration from plants (collectively known as evapotranspiration). This water vapor rises, cools, and undergoes condensation to form clouds. When these clouds become saturated, water returns to the Earth as precipitation (rain, snow, or hail). From there, it may flow over the surface as runoff into rivers and oceans, or seep into the ground through infiltration and percolation to recharge groundwater stores. Environment and Ecology by Majid Hussain, BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY, p.23

A common misconception in geography is that water is equally available everywhere. In reality, while Earth is the "Blue Planet," the vast majority of its water is saline. Understanding the distribution of freshwater is vital for mapping human settlements and agricultural patterns:

Water Source	Approximate Share of Total Earth Water	Type
Oceans	97.2%	Saline
Glaciers and Ice Caps	2.1% (Approx. 68-70% of all freshwater)	Freshwater
Groundwater	0.6% (Approx. 30% of all freshwater)	Freshwater
Rivers, Lakes, and Atmosphere	Less than 0.1%	Freshwater

As you can see, the water we actually use for drinking and farming—found in rivers, lakes, and accessible aquifers—represents less than 1% of the total water on Earth. This scarcity is why understanding the cycle's balance is so fundamental to geography. Environment and Ecology by Majid Hussain, BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY, p.24

Sources: Physical Geography by PMF IAS, Hydrological Cycle (Water Cycle), p.325; Environment and Ecology by Majid Hussain, BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY, p.23; Environment and Ecology by Majid Hussain, BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY, p.24

2. Macro Distribution: Saline vs. Fresh Water (basic)

To understand world mapping, we must first view our planet as a 'Blue Planet'. While approximately 71% of the Earth's surface is covered by water (Fundamentals of Physical Geography, Geography Class XI (NCERT 2025 ed.), Interior of the Earth, p.27), the distribution of this water is heavily skewed. The vast majority — roughly 97.2% to 97.5% — is saline water found in our oceans. This water has an average salinity of about 35 parts per thousand (Certificate Physical and Human Geography, GC Leong, The Oceans, p.107), making it unsuitable for direct human consumption or irrigation without expensive desalination processes.

The remaining 2.5% to 3% of Earth's water is freshwater. However, the catch for humanity is that most of this freshwater is not easily accessible. It is helpful to think of the hydrosphere as a constant system where water moves between states (solid, liquid, gas) but the total volume remains stable (Environment and Ecology, Majid Hussain, BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY, p.8). The breakdown of that tiny 3% of freshwater is where the real surprise lies: the largest portion is locked away in ice caps and glaciers (nearly 69%), followed by groundwater (about 30%).

Water Category	Approx. % of Total Water	Primary Locations
Saline Water	97.2%	Oceans and Saline Lakes
Freshwater (Total)	2.8%	Glaciers, Groundwater, Rivers, Lakes

For us as humans, the readily available surface freshwater (the water in the rivers, lakes, and atmosphere that we actually see on a map) constitutes less than 1% of all freshwater, and significantly less than 0.01% of all water on Earth. This highlights why water management is a critical global issue despite the planet being mostly blue.

Sources: Fundamentals of Physical Geography, Geography Class XI (NCERT 2025 ed.), Interior of the Earth, p.27; Certificate Physical and Human Geography, GC Leong, The Oceans, p.107; Environment and Ecology, Majid Hussain, BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY, p.8

3. Surface Water: Rivers and Freshwater Lakes (intermediate)

To understand surface water, we must first appreciate its scarcity. While Earth is often called the 'Blue Planet,' freshwater accounts for only about 2.5–3% of the total water on Earth. The vast majority of this freshwater—roughly 68–70%—is not liquid at all, but is locked away in polar ice caps and glaciers. What remains is primarily groundwater, leaving a remarkably tiny fraction (less than 1% of total Earth water) available as surface water in our rivers and lakes. Environment and Ecology, Majid Hussain, p.23

Lakes act as the primary storage vessels for surface freshwater, yet they are surprisingly concentrated. About 75% of the total volume of all freshwater lakes is found in just three specific regions: the Great Lakes of North America, the East African Rift Valley lakes, and Lake Baikal in Russia. Interestingly, lakes are categorized by their drainage: freshwater lakes typically have outlets (rivers flowing out), while saline lakes (like the Caspian Sea) are often endorheic, meaning they have no outlet, leading to a build-up of minerals and salts. Environment and Ecology, Majid Hussain, p.23

When we look at the geography of these water bodies, we see remarkable extremes. For instance, Lake Superior holds the title for the largest freshwater lake by surface area, whereas Lake Baikal is the deepest and contains the greatest volume of liquid freshwater on the planet. Physical Geography by PMF IAS, p.128

On the landmass, surface water flows through drainage basins. In the Indian context, these are classified by their origin into the Himalayan Drainage (perennial rivers like the Ganga and Indus fed by glaciers) and the Peninsular Drainage (seasonal rivers like the Godavari and Krishna). India is divided into 25 major river basins, with the Ganga basin being the largest by area. Geography of India, Majid Husain, p.4-5

Feature	Himalayan Rivers	Peninsular Rivers
Nature	Perennial (flow year-round)	Seasonal (dependent on monsoon)
Origin	Glaciers in the Himalayas	Plateaus and Western Ghats
Examples	Ganga, Indus, Brahmaputra	Godavari, Krishna, Narmada

Sources: Environment and Ecology, Majid Hussain, Basic Concepts of Environment and Ecology, p.23; Geography of India, Majid Husain, The Drainage System of India, p.4-5; Physical Geography by PMF IAS, Divergent Boundary, p.128

4. Groundwater Hydrology and Aquifers (intermediate)

Concept: Groundwater Hydrology and Aquifers

5. Oceanography: Salinity and Vertical Distribution (exam-level)

When we talk about Ocean Salinity, we are referring to the total content of dissolved salts in seawater, typically measured in parts per thousand (ppt). Think of it as a dynamic balance—a constant tug-of-war between processes that add fresh water and those that remove it. At the surface, salinity is primarily dictated by the evaporation-precipitation cycle. Where evaporation exceeds rainfall (like in the hot, dry subtropics), salinity climbs. Conversely, near the equator or at the mouths of great rivers, heavy rainfall and fresh water influx dilute the salt, lowering the salinity FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI, p.104.

However, salinity doesn't exist in a vacuum; it is deeply intertwined with temperature and density. Other factors being constant, as salinity increases, the density of the water also increases. This creates a vertical structure in the ocean known as stratification. Denser, saltier water is heavy and tends to sink, while fresher, lighter water floats on top. This leads to a fascinating vertical profile where salinity remains relatively fixed in the deep ocean—since there are no external inputs of salt or sun-driven evaporation there—but changes dramatically in the upper layers FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI, p.106.

A crucial concept to master is the Halocline. Just as the Thermocline represents a sharp drop in temperature, the Halocline is a distinct zone where salinity changes sharply with depth. Below this zone, salinity becomes very stable. However, the way it changes depends on where you are on the planet:

Region	Surface Condition	Vertical Trend
Equatorial Regions	Lower salinity due to heavy rain.	Salinity may increase slightly with depth.
High Latitudes (Polar)	Lower salinity due to melting ice.	Salinity increases with depth Physical Geography by PMF IAS, Ocean temperature and salinity, p.520.
Sub-tropics	High salinity due to high evaporation.	Salinity decreases with depth after a certain point.

Sources: FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.), Water (Oceans), p.104, 106; Physical Geography by PMF IAS, Ocean temperature and salinity, p.518, 520

6. The Cryosphere: Polar Ice Caps and Glaciers (intermediate)

The Cryosphere refers to the portions of Earth's surface where water is in solid form, including sea ice, lake ice, river ice, snow cover, glaciers, ice caps, ice sheets, and frozen ground (permafrost). Though it might seem remote, the cryosphere is a critical regulator of the global climate because of its albedo effect—the ability to reflect solar radiation back into space—and its role as the planet’s largest reservoir of freshwater. Currently, nearly 20% of the Earth's land surface experiences cryogenic processes, which involve intense frost action or the presence of permafrost Environment and Ecology, Majid Hussain, Climate Change, p.12.

When we look at the global water distribution, a common misconception is that freshwater is easily accessible. In reality, while about 2.5–3% of Earth’s water is fresh, roughly 68–70% of that freshwater is locked away in polar ice caps and glaciers. Liquid surface water (like rivers and lakes) and accessible groundwater actually represent less than 1% of the total water on Earth. This makes the cryosphere an essential 'frozen bank' for the world's water security.

Glacial bodies are classified primarily by their size and shape. A Continental Glacier (or Ice Sheet) is a massive wedge of ice covering more than 50,000 sq. km, such as those found in Antarctica and Greenland. If the ice cover is smaller than 50,000 sq. km and flows radially from a central dome, it is called an Ice Cap Environment and Ecology, Majid Hussain, Major Crops and Cropping Patterns in India, p.73. Other forms include Valley Glaciers (or Alpine glaciers), which are found in high mountain ranges like the Himalayas, and Piedmont Glaciers, which form when valley glaciers spill out onto a flat plain at the foot of a mountain Physical Geography by PMF IAS, Major Landforms and Cycle of Erosion, p.231.

Feature	Ice Sheet	Ice Cap
Size	Greater than 50,000 sq. km	Less than 50,000 sq. km
Flow	Overwhelms underlying terrain	Centrally domed; radial flow
Examples	Antarctica, Greenland	Vatnajökull (Iceland)

Sources: Environment and Ecology, Majid Hussain, Climate Change, p.12; Environment and Ecology, Majid Hussain, Major Crops and Cropping Patterns in India, p.73; Physical Geography by PMF IAS, Major Landforms and Cycle of Erosion, p.231

7. Detailed Breakdown of Freshwater Reservoirs (exam-level)

To understand the water crisis and global geography, we must first distinguish between the total water volume and the freshwater fraction. While Earth is often called the 'Blue Planet' because water covers 71% of its surface, about 97% of that is saline ocean water, which is unfit for human consumption. This leaves us with a tiny slice of roughly 2.5% to 3% as freshwater FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.), Water (Oceans), p.101. Even this small amount is not entirely accessible; it is distributed across various 'reservoirs' with varying degrees of availability.

The distribution of this freshwater is highly unequal. The vast majority—roughly 68% to 70%—is locked away in glaciers and polar ice caps, making it largely unavailable for immediate human use Exploring Society: India and Beyond, Oceans and Continents, p.31. The next largest reservoir is groundwater, accounting for about 30%. The water we see in our daily lives—rivers, lakes, and the atmosphere—actually represents less than 1% of the total freshwater on Earth. This is the 'accessible' fraction that sustains most terrestrial life and human civilizations, yet it is incredibly scarce INDIA PEOPLE AND ECONOMY, Geography Class XII (NCERT 2025 ed.), Water Resources, p.41.

When we zoom into surface freshwater lakes, which hold only about 0.017% of the Earth's total water, we find another layer of geographic concentration. Remarkably, 75% of the total volume of all freshwater lakes is found in just three specific regions: the Great Lakes of North America, Lake Baikal in Russia, and the Rift Valley lakes of East Africa Environment and Ecology, Majid Hussain, BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY, p.23. This geographical 'clustering' explains why water security varies so drastically from one nation to another.

Reservoir	Approx. % of Freshwater	Accessibility
Ice Caps & Glaciers	~69%	Locked/Very Low
Groundwater	~30%	Medium to High
Surface Water (Lakes, Rivers)	< 1%	Very High (but scarce)
Atmosphere & Soil Moisture	< 0.05%	Transient

Sources: FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.), Water (Oceans), p.101; Exploring Society: India and Beyond, Social Science-Class VI, NCERT (Revised ed 2025), Oceans and Continents, p.31; INDIA PEOPLE AND ECONOMY, Geography Class XII (NCERT 2025 ed.), Water Resources, p.41; Environment and Ecology, Majid Hussain (Access publishing 3rd ed.), BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY, p.23

8. Solving the Original PYQ (exam-level)

Now that you have mastered the global water distribution charts, this question tests your ability to distinguish between relative proportions and absolute availability. You have learned that while Earth is the 'Blue Planet,' the vast majority of its water is saline. Statement 1 requires you to synthesize two facts: that freshwater accounts for only about 2.5–3% of all water, and within that small slice, the majority is locked away. Because readily accessible surface water and usable groundwater constitute less than 1% of the total global water, Statement 1 is factually accurate.

Moving to Statement 2, the reasoning hinges on precision within the freshwater sub-category. According to National Geographic, approximately 68–70% of Earth's freshwater is stored in glaciers and ice caps. The figure of '95%' provided in the question is a classic exaggeration trap. UPSC often uses plausible-sounding but inflated percentages to test whether you have a firm grasp of the data or are merely guessing based on general trends. Since the actual proportion is closer to two-thirds rather than the vast majority implied, Statement 2 is incorrect.

Therefore, the correct answer is (A). Options (B) and (C) fall away because of the numerical error in the second statement, while (D) is incorrect because the first statement is a well-established geographical fact. Always be wary of extreme percentages in UPSC papers; they are frequently the pivot point between a right and wrong answer.