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Impact of Lockdown on Social and Mobile Networks During the COVID-19 Epidemic: A Case Study of Uttarakhand
Published in Ram Shringar Raw, Vishal Jain, Sanjoy Das, Meenakshi Sharma, Pandemic Detection and Analysis Through Smart Computing Technologies, 2022
Prachi Joshi, Bhagwati Prasad Pande
The Ozone layer envelops the earth and protects living things on the planet’s surface by the ultraviolet (UV) radiation. Depletion of the Ozone layer is due to many factors, the most dominant of them is the release of Chlorine from Chlorofluorocarbons which destroys the Ozone. The scientists confirmed that the largest hole in the ozone layer was healed by itself amid the worldwide COVID-19 lockdown.
Environment and health
Published in Sally Robinson, Priorities for Health Promotion and Public Health, 2021
Tristi Brownett, Joanne Cairns
Planet Earth is surrounded by an atmosphere of five gaseous layers. These layers help to protect the planet and give it properties such as the air we breathe and an ability to maintain moisture. Within the atmosphere is the stratosphere, which contains ozone gas. Ozone absorbs heat and protects humans from the sun’s ultraviolet (UV) radiation. As there is limited air movement in the stratosphere, chemicals and particles can become trapped for long periods. This is problematic as some of these chemicals such as chlorofluorocarbons (CFCs) found in coolants and aerosol propellants are known to deplete the ozone layer, thus allowing more heat from UV radiation to penetrate the earth. The ozone layer has become thinnest at the north and south poles, and the intensification of UV radiation and heat reaching the earth is contributing to the melting of polar ice caps. As the ice melts, it is inevitable that oceans will rise, and low-lying countries will experience flooding. It is encouraging that scientists have found the ozone layer can recover if humans limit their use of CFCs, causing the heat from the UV radiation to reduce and the earth to cool (Knight, 2011).
The health of the nation
Published in Brendan Curran, A Terrible Beauty is Born, 2020
We have seen how cancer normally requires mutations to occur in two or more genes concerned with the regulation of cell division. It therefore follows that any factors increasing the frequency of mutations will also increase the tendency for cancer cells to arise; conversely, anything decreasing mutation frequency delays cancer cell formation. This consideration underlies concern about excessive exposure to bright sunlight and the depletion of the ozone layer resulting in more skin cancer. The ozone layer normally absorbs ultraviolet light from the sun. In its absence, these rays in sunlight cause DNA damage much more often than the repair system can accommodate. As a result, mutations are generated, some of which induce oncogenes and subsequently trigger the development of a skin cancer.
Climatic Droplet Keratopathy Is a Misnomer for This Corneal Degeneration
Published in Seminars in Ophthalmology, 2023
Horacio M. Serra, Pablo A. Moro
The scientists led by Serra also evaluated the prevalence of pterygium, pinguecula, and CDK in people inhabiting all these regions of Argentina. In El Cuy the prevalence of pinguecula, CDK, and pterygium were 32.1%, 28.9%, and 13.2% respectively. A statistically significant association was found between CDK and male patients (21.4% vs 7.5%, p-value < 0.05). There was also an association between CDK with pinguecula and with pterygium, both more frequent in males (p < .05). It is worth mentioning that the total O3 column concentrations (Dobson units) from each region were analyzed for each of the last ten years (measured on four dates: March 21, June 21, September 21, and December 21), and no significant differences in annual average were found (p = .06).57 These results rule out any thinning of the ozone layer in the studied regions.
Detrimental effect of UV-B radiation on growth, photosynthetic pigments, metabolites and ultrastructure of some cyanobacteria and freshwater chlorophyta
Published in International Journal of Radiation Biology, 2021
Mostafa M. El-Sheekh, Eman A. Alwaleed, Aml Ibrahim, Hani Saber
Ultraviet radiation (UV) is emitted from the sun and divided to three wavebands; UV-A has wavelengths between 320–400 nm and is not screened out by the molecular oxygen (O2) and the ozone layer, UV-B has wavelengths between 280–320 nm and is usually reflected by ozone layer, and the most harmful, UV-C is entirely screened out by a combination of molecular oxygen and ozone layer (Yongji et al. 2018). So, the ozone layer is vital to natural life in the globe because of their function in absorption of UV radiation. Additional UV radiation has been entered to the earth biosphere due to depletion in this protective layer. The depletion of ozone layer induced by substances such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) (the United States Environmental Protection Agency 2008). Increased UV levels resulted in climate change and is portend to alteration in weather and growth patterns on the earth (Bi and Zhang 2007). Atmosphere pollution as a result of rapid industarlization is the main reason for depletion in this protective ozone layer (Björn 2007). The Antractic ozone hole is the most spectacular example for this depletion (Björn 2007). During 1997 to 2000, at northern multitudes, ozone level depletion was around 6% in relation to 1980 levels, which could cause an increase in UV-B up to 12% (McKenzie et al. 2003; Arróniz-Crespo et al. 2008). So, the influence of UV radiation on life form became a critical affair over the past three decades and could also be vital in the years to come.
‘12 tips for teaching environmental sustainability to health professionals’
Published in Medical Teacher, 2020
Patricia Nayna Schwerdtle, Janie Maxwell, Graeme Horton, James Bonnamy
There are many examples to draw from which show how focused advocacy can lead to positive change. These include the Montreal Protocol which led to the banning of CFCs and the regeneration of the ozone layer with positive consequences for ecosystems and human health. Principles such as “think global, act local” can provide a reassuring foundation for students to identify relevant strategies for their clinical context. Students can be taught principles of change theory, leadership and advocacy to strengthen their skills in complex systems change. Furthermore, students can be reminded of the potential for exponential social change, demonstrated from historical examples such as evolution in civil rights and democracy.