Soot, also called black carbon is one very dangerous pollutant. 

 
  1. The origin of soot
+ Soot comes from the incomplete combustion of coal, oil, wood, and other fuels.
+ In other words diesel engines, vehicle exhaust pipes, farming machines, construction equipment, or simply fires in grills, fireplaces, and stoves are potential sources of soot.
=> It appears in our daily life and can easily affect every one of us.

   2. Soot and global warming
+ Soot like all black things absorbs sunlight and heats up the atmosphere.
+ It is the second most damaging greenhouse gas after C0₂, and twice as harmful to the climate.
+ Although black carbon remains in the atmosphere for no more than seven days it is particularly damaging to frozen areas. Soot emissions might be responsible for the quick melting of the Arctic.
=> Controlling black carbon can help to slow down global warming.

  3. The effect of soot on human health
+Soot is harmful to health. A soot particle is very tiny - smaller than dust and mold, and about 1/30 the width of a human hair. It can easily go into our bloodstream and lungs via the nose and throat. 
=> As a result, breathing in tiny particles can cause asthma attacks, heart disease, bronchitis, and many other respiratory illnesses.

  4. Ways to reduce soot emissions.
+ Large quantities of man-made soot enter the atmosphere every year. The effects are most damaging regionally, especially in South and East Asia, Latin America and parts of Africa. 
+ In developing countries, reducing soot emissions can be achieved by replacing traditional stoves with clean, alternative fuel cookers and heaters. Installation of filters to remove black carbon from diesel vehicles can also reduce soot. 
+ Changing to electric or hydrogen vehicles will also reduce the impact on the environment.

The mass media are means of communication, such as books, newspapers, recordings, radio, movies, television, mobile phones and the Internet, that can reach a large audience.

Role
The role of the mass media is not only to entertain and amuse the masses. Its most important role is to provide information and news about events in different parts of the world as they occur. Educating people about their rights and responsibilities is another function of mass media.

Popularity
Until recently, mass media forms were classified into six categories according to the sequence of their advent: print, recordings, cinema, radio, television, and the Internet. Each form has its own characteristic content types, creative artists, and business models. In the early 21^st century, with the explosion of mobile communication technology, the mobile phone has emerged as a new and unique media channel. 

The Internet and mobile communication are now the most popular means of receiving information and interacting with people through email, instant messaging, apps, search engines, blogs. social networks and other services. Most print and broadcast media have a presence on the web by having video adverts or Quick Response Codes (QR Codes) that link to specific websites.

Froms
Each form of mass media has had an important impact on society. Magazines were the first visual medium before the advent of television, which together with radio, brought entertainment and news programs into people's homes. 
However, all these media had to change and adapt to the advent of the Internet and the Digital Media Age.