The most common form of air pollution in the San Antonio region is. ground-level ozone, a major component of smog. Ground-level. ozone forms readily in the atmosphere during warm, sunny days. Sunlight causes chemicals from the fuels we burn (e.g., gasoline. and diesel) and vapors from such products as gasoline and paint.
Cover Photo Dimensions. The Facebook cover photo area is 851 pixels wide by 315 pixels tall. Photos uploaded for use as a cover photo must be at least 399 pixels wide. Like profile photos, these photos are resized to comply with the cover photo template if they are smaller than the 851 pixel width.
Mark Zuckerberg: Facebook minimum age limit should be removed. Facebook CEO Mark Zuckerberg hopes to one day lift the minimum age restriction on the social network, allowing those under 13-years-old to create an account. Facebook's Statement of Rights and Responsibilities require users of the social network to be at least 13 years old (and even older, in some jurisdictions).