As few as 10 grains per cubic meter of air can provoke symptoms in the most sensitive people; during late summer months the count can reach into the hundreds. (discovermagazine.com)
«Many small businesses we've talked to are simply finding that it's tough to track down prospective customers in late summer months.» (inc.com)
Parkinson's study, which was published in 1979, found that a doubling of atmospheric carbon dioxide from preindustrial levels would cause the Arctic to become ice - free in late summer months, probably by the middle of the 21st century. (insideclimatenews.org)