Showing posts from July, 2020

What is Weather Radar and How Does it Works?

Radar is developed in World War II to detect enemy aircraft. Over a while, they noticed that they were catching signals from raindrops, hailstones, and snowflakes. After the end of the war, these radars were used for weather forecasting. From 1948 weather radar was installed on aircraft to help the pilots detect bad weather. Weather Radar and It's Working. A weather radar is nothing but an antenna that rotates and scans the sky. It transmits a directional, narrow beam of microwaves having a wavelength in the range of 1-10 centimeters. These wavelengths are about 10 times the size of the raindrops, hailstones, and snowflakes. So, these particles scatter the microwaves back and a return signal is picked by the respective radar. What does a weather radar measure? From the whole process, mainly five things are measured: 1. The time taken for the microwave pulse to travel to and from the scattering object gives the distance. 2. The Doppler shift of the return microwave pulse giv

How to Prevent Australian Bushfires from Happening Again?

Australian bushfires are caused by increasing atmospheric temperature, hotness, and dryness which is caused by climate change. Australian bushfires have killed almost 800 people since 1851 and billions of animals. So, the the real question arise that "How we can prevent Australian bushfires from happening again and again or it will kill same number of people and animals every year". So, in this post, I talked about workable steps to prevent  Australian bushfires from happening again. 1) National methods to prevent Australian Bushfires in the future 1. Moving away from fossil fuels According to the International Energy Agency , Australia is 4th largest exporter of coal and natural gas. Coal is responsible for 72% Green House Gas (GHG) emission in Australia which leads to a rise in global temperature in the summer season. This makes the environment drier and hotter which is the main reason for forest fires. Recently, the Australian government approved Adani’s c

Soil Pollution and its Sources and Preventions

Soil is the topmost part of the earth's crust and it's made due to decomposition and disintegration of surface rocks. It might have been formed in one place but it traveled to another due to weather factors like wind, storms, floods, etc. Soil is essential for the survival of the human race. Soil provides nutrients and minerals to plants which provide us fruits and vegetables. Soil is known as the heart of the biosphere. But due to anthropogenic activities, soil pollution is occurring in many countries. Soil pollution directly affects the plants and thus affects humans also. Soil pollution have many sources from industries to farms but the real question is how exactly soil pollution affects human life? So let's discuss... What is Soil Pollution? The addition of contaminants like chemicals, pesticides, domestic waste, etc into the soil, is called soil pollution. Today, due to an increase in population, the soil is becoming dirty and infertile. Soil gets p