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The UV index is a number linearly related to the intensity of sunburn-producing UV radiation at a given point on the Earth's surface. It cannot be simply related to the irradiance (measured in W / m 2 ) because the UV of greatest concern occupies a spectrum of wavelengths from 295 to 325 nm, and shorter wavelengths have already been absorbed a ...
The State of Texas concluded that, since 2000, the Manchester neighborhood in eastern Houston had the highest annual averages of 1,3-butadiene of any area in Texas. [53] Houston's air quality has often been compared to Los Angeles and Beijing. [49] Houston has introduced many programs since the 2000 federal order to reduce air pollution in the ...
UV rays, and therefore sunlight and sunlamps, are the only listed carcinogens that are known to have health benefits, [55] and a number of public health organizations state that there needs to be a balance between the risks of having too much sunlight or too little. [56] There is a general consensus that sunburn should always be avoided.
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Texas' weather varies widely, from arid in the west to humid in the east. The huge expanse of Texas encompasses several regions with distinctly different climates: Northern Plains, Trans-Pecos Region, Texas Hill Country, Piney Woods, and South Texas. Generally speaking, the eastern half of the state is humid subtropical, while the western half ...
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A daily exposure index played on some NOAA stations. The ultraviolet (UV) index is categorized by the maximum exposure of the sun's rays during the peak hours of sunlight. It ranges in the following numbers/categories: 1-2 (Low), 3-5 (Moderate), 6-7 (High), 8-10 (Very High), and 11+ (Extreme)