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Read the following text and answer the following questions on the basis of the same: Ozone layer depletion: We are all exposed to UV radiation from the sun. The sun is by far the strongest source of ultraviolet radiation. UV radiation spectrum is divided into three regions called UVA, UVB and UVC. As sunlight passes through the atmosphere, all UVC and most UVB is absorbed by ozone, water vapour, oxygen and carbon dioxide. UVA is not filtered as significantly by the atmosphere. The three types of UV radiation are classified according to their wavelength. They differ in their biological activity and the extent to which they can penetrate the skin. The shorter the wavelength, the more harmful the UV radiation The UV region covers the wavelength range 100-400 nm and is divided into three bands: • UVA (315-400 nm) • UVB (280-315 nm) • UVC (100-280 nm). Short-wavelength UVC is the most damaging type of UV radiation. However, it is completely filtered by the atmosphere and does not reach the earth's surface UV level reaching the earth changes with latitude and altitude. UV levels are higher closer to the equator. Closer to the equator the sun's rays have a shorter distance to travel through the atmosphere and therefore harmful UV radiation absorption is less. With increasing altitude less atmosphere is available to absorb UV radiation. With every 1000 m in altitude, UV levels increase by approximately 10%. Ozone is a particularly effective absorber of UV radiation. As the ozone layer gets thinner, the protective filter activity is progressively reduced. Consequently, the people and the environment are exposed to higher levels of UV radiation, especially UVB. Ozone depletion is caused by human-made chemicals released into the atmosphere. How many bands are there in UV radiation spectrum?

Americans love to contemplate - and legislatively promote, to whatever degree possible - the virtue of hard work. Here in the United States, people already work more hours per year than their English- speaking counterparts in Britain, Canada and Australia - not to mention those enviable denizens of European social democracies, who enjoy the kind of leisure time only their highest-paid workers can afford. So perhaps it's not surprising that several new pro-work policy ideas are enjoying attention on the left and the right. On the right, work requirements for Medicaid, food stamps and housing assistance represent the latest conservative effort to make sure Americans work for any benefits they receive. Work-life balance. It has been the professional itphrase for the past few years. From how-to books to meditation apps and even company-sponsored initiatives like unlimited vacation, employers and employees alike have been trying to strike a balance between their personal and professional lives. And it seems to be working. Or is it? According to employee reviews on Glassdoor, work-life balance is not what it used to be. Despite the best efforts of executives and an upgraded nomenclature (“work-life fit”), American workers continue to struggle with stress. But why? What’s missing from our jobs, or rather, is it in our personal lives? Since we live in the digital age, it’s easy for employees to be connected to their work 24/7. All day every day we receive e-mails from our boss, notifications from our work chats and use our calendars for reminders and scheduling–all on our smartphones. So thanks to technology, employees often check their e-mail every few minutes and constantly put in extra hours on nights, weekends and even when they’re out on vacation. If you need help maintaining a healthy work-life balance, remember that it’s all about setting goals and expectations between you and your manager. By having a good, open communication process with your boss, you’ll better understand what they expect of you, which makes it easier to manage your work life with your personal life. The more clear your boss is to you, and the more clear you are to them, the healthier that work life balance is going to feel. But, unfortunately, not every job works this way. Inevitably, there are some roles that may require more attention during and out of normal office hours. If you’re not the type who can and wants this kind of schedule, that’s something to consider before accepting a job. So before accepting an offer, research the position and make sure you fully understand the hours that are expected in the role, where and how you can get their work done, and the overall nature of the job.There's a balance to be struck where it comes to work and rest, but in the United States, values and laws are already slanted drastically in favor of work. I would advise those concerned about Americans' dignity, freedom and independence to not focus on compelling work for benefits or otherwise trying to marshal people into jobs when what they really need are health care, housing assistance, unemployment benefits and so forth. Instead, we should focus more of our political energies on making sure that American workers have the dignity of rest, the freedom to enjoy their lives outside of labor and independence from the whims of their employers. Which of the following can be inferred from the words of the author? Work life balance is a concept which is hyped now-a-days and companies are trying to implement it to a great extent. Work life balance is a bait used by organizations to capture the attention of employees and make them work at a lower cost American laws are strictly against the concept of work-life balance and they focus more on work and increasing productivity.

Which of the following is true regarding the birth of how-to and meditation apps to help people balance their professional and personal lives?

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The bar graph given below represents the number of boys in a school using three apps for three months. Number of boys using Whatsapp in February is how much percent more than the number of boys using Hike in February?