It is determined through tests that the harmful substances in a fog droplet, such as acid,
sodium, salt, amine, phenol, dusts and pathogen microbes, are dozens of times more than that in a normal atmospheric water drop.
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The United States Green Building Council, a nonprofit industry group thatencourages the creation of environmentally conscious buildings, will introduce abird-safety credit this fall as part of its environmental certification process.
Such crashes are the second-leading cause of death for migrating birds, afterhabitat(栖息地loss, with an estimated number of death ranging up to a billion a year.
For weeks he had worried over how to convince the graduates that they, too,could succeed against seemingly impossible odds, that they could move mountains.