How Smoke From Canada's , Wildfires Has Transformed , Skies in the U.S.<br />'The New York Times' reports that atmospheric scattering <br />is why skies across the northeastern United States have <br />turned orange amid heavy smoke from Canadian wildfires.<br />On a normal day with a blue sky, sunlight bounces off <br />of molecules of air in the atmosphere, scattering high <br />energy colors with shorter wavelengths into blue light.<br />Larger smoke particles scatter <br />the orange and red colors <br />in the light from the sun.<br />The resulting surreal haze <br />is also closely related to how <br />the sky appears at sunset.<br />As the sun travels closer to the horizon, only longer <br />wavelengths can travel through the atmosphere to <br />be perceived as the reddish hues visible at sunset.<br />'NYT' reports that hundreds of fires continue to burn across <br />Eastern Canada, spreading clouds of hazardous air <br />pollution across a large swath of the eastern U.S.<br />Air quality warnings have been <br />issued for areas spanning <br />from New York to the Carolinas.<br />Air quality warnings have been <br />issued for areas spanning <br />from New York to the Carolinas.<br />On June 7, major cities experienced unhealthy <br />levels of air pollution, including <br />Philadelphia, Washington and New York.<br />'NYT' reports that while air quality is expected to improve in parts of the Northeast, smoke from the ongoing fires continues to spread across the U.S.<br />On June 8, Canadian authorities said that approximately <br />250 wildfires were burning out of control in the eastern part of the <br />country. Some of those fires have already burned for weeks.
