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How much of sunlight is sufficient for vitamin D generation? More than commonly believed. According to recent studies, at least 50% of the world population has deficit in vitamin D. People who live in areas with a small number of sunny days per year and / or a high degree of air pollution are at increased risk of getting vitamin D deficiency and its related diseases. A growing number of studies indicates that vitamin D plays an important role in the prevention of many diseases

The process of air pollution has been going on not the first millennium, but never before had it been so intense like in recent decades.

The results did not keep us waiting; urban environmental issues (in Beijing for the second time in December a "red" level of anxiety is declared because of the smog), depletion of the ozone layer, which protects Earth's surface from the harmful for all living ultraviolet radiation, global warming, entailing an increase in global sea level, which can have catastrophic consequences for all mankind.

Global Ultraviolet index (UV index), a measure of UV radiation levels, was developed and recommended by the WHO as a way of warning the population about the dangers of UV rays on health, helping people understand the need to use sunscreen. Open Weather Map created quick and simple APIs, which developers can use to create a variety of easy-to-use applications that could be useful for both promotional and marketing media within the tourism industry as well as for individual travelers planning a trip to tropical destinations.

New air pollution APIs.

Taking into account great importance of climate change issue OpenWeatherMap would like to make their own contribution into making this world the better place. 

The first version of API includes several data sets: CO (carbon), NO2 (nitrogen dioxide), O3 (ozone), SO2 (sulfur dioxide). 

We hope that air condition data, current  and historical, give you a great opportunity to create variety of new applications and analytic services to keep an eye on what we breath in real time and if there any improvement over time. 

Sunburn is traditionally considered an indicator of the attractiveness and a symbol of good health. Small amounts of UV are beneficial for people and essential in the production of vitamin D and serotonin, which is responsible for mood and overall vitality.Prolonged human exposure to solar UV radiation may result in acute and chronic health effects on the skin, eye and immune system. Over the longer term, UV radiation induces degenerative changes in cells of the skin, fibrous tissue and blood vessels leading to premature skin aging, photodermatoses and actinic keratoses. In the most serious cases, skin cancer and cataracts can occur.