🔹 What is Population?

👉 Population = Total number of people living in a specific area (city, country, world).

👉 Tracked using census → collects and analyzes population data.

🔹 Why Population Matters?

✔️ Affects almost every part of society:

• Health

• Education

• Economy

• Environment
  
  ➡️ As population grows → pressure on natural resources increases.

🔥 Population Growth = Environmental Pressure

🔺 More People = More Needs

• Food 🥘

• Water 💧

• Energy ⚡

• Housing 🏘️

• Transportation 🚗

🔺 This leads to:

• Overuse of land, forests, water

• Pollution

• Habitat destruction

• Climate change

🔸 How Population Affects the Environment?

1️⃣ Resource Extraction ⛏️

More people = More use of:
→ Fossil fuels (coal, oil, gas)

→ Minerals, forests, wildlife

➡️ Leads to pollution & waste.

2️⃣ Freshwater Demand 💧

Used for:
→ Drinking

→ Farming

→ Industry

➡️ Water demand ↑ much faster than population.

3️⃣ Urban Expansion 🏙️

More people = Need for space

→ Forests cleared for homes, roads

➡️ Loss of biodiversity & natural habitats

🔸 Human Population Dynamics

🧑‍🤝‍🧑 Population Size

• No fixed link with environment

• But larger population → more stress on:
  → Arable land 🌾
  
  → Water 💧
  
  → Fisheries 🐟
  
  → Forests 🌲

📍 Population Distribution

• 80% of people live in developing countries

• More people → cities growing fast (urbanisation)

Impacts:
→ Overcrowding

→ Pollution

→ Pressure on public services

🧬 Population Composition

• Young people (under 24) and elderly are rising

• Young people = more likely to move to cities
  
  ➡️ Urban migration → overcrowded cities → more waste, more energy use

🌍 Global Environmental Challenges

⚠️ Natural Resources Under Pressure

• Water scarcity

• Soil degradation

• Air & water pollution

• Deforestation

• Coastal erosion

❌ Developed Nations

• Consume resources faster than nature can replenish

❗ Developing Nations

• Struggle to meet basic needs for growing populations

🏥 Sector-Wise Environmental Concerns

1. Public Health

• 12 million deaths/year from polluted water & poor sanitation

• 3 million deaths from air pollution

• Toxic chemicals → long-term health damage

2. Freshwater

• Limited supply, rising demand

• By 2025 → 3 billion people in 48 countries may face water shortages

3. Oceans & Coasts

• Half of coastal areas under pressure

• Oceans = overfished & polluted

• Fish catch decreasing steadily

💡 Final Thought:

🌱 Growing population = Growing responsibility

We must:
→ Use resources wisely

→ Reduce pollution

→ Promote sustainable living

📢 Everyone must act now to protect our planet!