Natural hazards refer to potential events such as earthquakes or floods that can occur in nature, while natural disasters are significant events that cause severe damage, impacting human life, property, and the environment. The key difference lies in the severity and actual consequences of the events.

Infrasonic waves have frequencies below 20 Hz, which are inaudible to humans, while ultrasonic waves have frequencies above 20 kHz, also inaudible. Infrasonic waves are often associated with natural phenomena like earthquakes, whereas ultrasonic waves are used in applications like medical imaging and cleaning.

The Indian Remote Sensing System, developed by ISRO, employs satellites for data collection and analysis. It plays a crucial role in agriculture, water resource management, environmental monitoring, and disaster management, providing vital information for planning and development across various sectors in India.

A National Park focuses on conservation and tourism, with strict regulations on human activities. In contrast, a Sanctuary prioritizes the protection of wildlife, allowing more flexibility for human activities, such as local community access. National Parks generally have more extensive management plans and infrastructure than Sanctuaries.

Measures to control noise pollution include:

1) Implementing noise regulations for vehicles and industries.

2) Increasing green spaces for sound absorption.

3) Setting time limits for construction activities.

4) Raising public awareness about noise reduction.

5) Establishing and protecting quiet zones in urban areas.