One of our era's greatest scourges is air pollution, on account not only of its impact on climate change but also its impact on public and individual health due to increasing morbidity and mortality. There are many pollutants that are major factors in disease in humans. Among them, Particulate Matter (PM), particles of variable but very small diameter, penetrate the respiratory system via inhalation, causing respiratory and cardiovascular diseases, reproductive and central nervous system dysfunctions, and cancer. Despite the fact that ozone in the stratosphere plays a protective role against ultraviolet irradiation, it is harmful when in high concentration at ground level, also affecting the respiratory and cardiovascular system. Furthermore, nitrogen oxide, sulfur dioxide, Volatile Organic Compounds (VOCs), dioxins, and polycyclic aromatic hydrocarbons (PAHs) are all considered air pollutants that are harmful to humans. Carbon monoxide can even provoke direct poisoning when breathed in at high levels. Heavy metals such as lead, when absorbed into the human body, can lead to direct poisoning or chronic intoxication, depending on exposure. Diseases occurring from the aforementioned substances include principally respiratory problems such as Chronic Obstructive Pulmonary Disease (COPD), asthma, bronchiolitis, and also lung cancer, cardiovascular events, central nervous system dysfunctions, and cutaneous diseases. Last but not least, climate change resulting from environmental pollution affects the geographical distribution of many infectious diseases, as do natural disasters. The only way to tackle this problem is through public awareness coupled with a multidisciplinary approach by scientific experts; national and international organizations must address the emergence of this threat and propose sustainable solutions.
Keywords: air pollution, environment, health, public health, gas emission, policy
Approach to the Problem
The interactions between humans and their physical surroundings have been extensively studied, as multiple human activities influence the environment. The environment is a coupling of the biotic (living organisms and microorganisms) and the abiotic (hydrosphere, lithosphere, and atmosphere).
Pollution is defined as the introduction into the environment of substances harmful to humans and other living organisms. Pollutants are harmful solids, liquids, or gases produced in higher than usual concentrations that reduce the quality of our environment.
14. Put the verbs in the correct form.
1) Maggie likes Christmas very much. [Present Simple]
2) The Seaweed Monsters took Santa's bag yesterday. [Past Simple]
3) Kevin is watching a comedy now. [Present Continuous]
4) The children always have a party at Christmas. [Present Simple]
5) I visited my grandparents last week. [Past Simple]
6) Mum usually gets up at half past six. [Present Simple]
7) Mr and Mrs Bell are writing Christmas cards now. [Present Continuous]
15. Write the sentences in your exercise-book.
1) Did you make a cake at Christmas?
2) My sister reads magazines every day.
3) The children went to the party on Saturday.
4) Do you celebrate Christmas on the 25th of December?
5) Slimy and Slobby are pulling crackers now.
