«Hay fever
from ragweed pollen could double due to climate change.»
Research published today reveals that the number of people suffering hay fever
from ragweed pollen could double in just 35 years.
Not exact matches
This gets even worse the closer plants are to sources of carbon dioxide —
ragweed growing next to highways produces more potent pollen than
ragweed growing away
from large roads.
When you are allergic to
ragweed pollen and inhale it
from the air, hay fever symptoms show up.
For the more than 40 to 50 million American adult and children who suffer
from the misery and discomfort of allergies, protecting themselves and their families
from exposure to the usual suspects -
ragweed and pollen - means locking them selves indoors.
Our projections suggest that
ragweed pollen will persist
from mid-September to mid-October across most of Europe.
Allergies vary
from person to person, so even if you're not bothered by spring's tree pollen, summer's grass pollen or fall's
ragweed pollen may affect you.
Within the experimental plots,
ragweed density ranged
from no plants (a weed - free control) to 12 plants per meter (about 39 inches) of the row.
When you suffer
from allergies, the outside world is filled with sneeze - inducing triggers everywhere you turn,
from tree pollen to
ragweed to your co-worker's dog - hair - covered sweater.
The most common pollens that cause this cross-reactivity are
from birch,
ragweed, or grasses.
Allergy data comes
from a recent Quest Diagnostics» annual allergy report, which provides an index based on the percentage of residents who are allergic to
ragweed, mold, dust mites, cats, dogs, and even food.
Dr. Lewis Ziska, a plant physiologist with the U.S. Department of Agriculture's Crop Systems and Global Change Laboratory, and colleagues at the National Allergy Bureau and Aerobiology Canada, analyzed
ragweed pollen counts at ten monitoring stations along a south to north transect,
from Texas north to Saskatchewan, Canada,
from 1995 to 2009.
Pollen data
from 10 locations, along a north - south section of North America, were assessed for
ragweed pollen counts for each year
from 1995 to 2009.