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.
6 new facts about Facebook. Facebook turns 10 tomorrow and reaches that milestone as the dominant social networking platform, used by 57% of all American adults and 73% of all those ages 12-17. Adult Facebook use is intensifying: 64% of Facebook users visit the site on a daily basis, up from 51% of users who were daily users in 2010.