Geospatial Science

A datum is a reference system used to model the shape and size of the Earth and to define coordinate systems for mapping and spatial analysis.
It consists of an ellipsoid (mathematical model of Earth’s shape) and its orientation relative to the Earth’s center of mass.
Datums can be local or global.
A local datum, like the Everest Datum used in India, fits a specific region well but may not align accurately worldwide.
WGS84 (World Geodetic System 1984) is a global datum developed for GPS and worldwide mapping.
WGS84 is more accurate because it uses satellite measurements to fit the entire Earth, aligning with its center of mass and providing consistent coordinates globally.
This makes it ideal for GPS navigation, global datasets, and integration across countries.
Unlike local datums that may vary regionally, WGS84 supports seamless sharing and overlaying of geospatial data from different sources worldwide.
Therefore, WGS84’s global consistency makes it more reliable than any local datum in modern GIS applications.

Green jobs in eco-tourism play a vital role in promoting sustainable travel and environmental conservation.
They provide employment opportunities that focus on protecting natural resources, supporting local communities, and minimizing negative impacts on the environment.
Examples of green jobs include eco-guides, conservation officers, wildlife wardens, and staff in eco-friendly resorts.
These roles ensure that tourism activities respect ecological limits, educate visitors about conservation, and encourage responsible travel behavior.
Green jobs help balance economic development with ecological preservation, making tourism a tool for sustainable development.
Therefore, green jobs strengthen eco-tourism by linking economic benefits with environmental stewardship.

Stress management is a set of techniques and practices aimed at reducing mental and physical stress.
It helps individuals cope with challenges in a healthy way, preventing negative effects on the body and mind.
Methods like meditation, regular exercise, proper sleep, and time management reduce stress levels and promote relaxation.
Healthy stress management encourages positive thinking, emotional balance, and improved productivity.
Without effective stress management, stress can lead to anxiety, fatigue, and poor health.
Therefore, managing stress properly keeps a person feeling refreshed, motivated, and able to handle daily responsibilities with a positive mindset.

A healthy diet is essential for maintaining overall physical and mental well-being.
Nutrient-rich foods provide the body with vitamins, minerals, proteins, carbohydrates, and healthy fats that are necessary for energy, growth, and repair.
Eating fruits, vegetables, whole grains, and lean proteins helps strengthen the immune system, maintain a healthy weight, and reduce the risk of chronic diseases like diabetes and heart disease.
For the mind, a balanced diet supports brain function by improving concentration, memory, and mood.
Nutrients such as omega-3 fatty acids, vitamins B and D, and antioxidants have been shown to boost mental health and reduce stress and depression.
Therefore, a healthy diet contributes to both a strong body and a healthy, focused mind.

Watershed Management is a scientific process aimed at the comprehensive development and conservation of soil, water, and other natural resources within a watershed area.
It involves the balanced utilization of land and water resources to achieve sustainable agricultural production while minimizing environmental risks such as soil erosion, water pollution, and resource depletion.
Proper watershed management combines strategies like contour farming, afforestation, check dams, and community participation to ensure water availability, soil fertility, and ecosystem health.
Therefore, the blank is correctly filled with Watershed Management.

CNG stands for Compressed Natural Gas.
It is a type of fuel used mainly in vehicles as an alternative to petrol and diesel.
Natural gas is compressed to high pressure and stored in cylinders for use in cars, buses, and other vehicles.
CNG is considered a cleaner fuel because it produces fewer harmful emissions compared to conventional fuels.
It is cost-effective and helps reduce air pollution in cities.