Environmental Impact of Pesticides - Air

Air

See also: pesticide drift

Pesticides can contribute to air pollution. Pesticide drift occurs when pesticides suspended in the air as particles are carried by wind to other areas, potentially contaminating them. Pesticides that are applied to crops can volatilize and may be blown by winds into nearby areas, potentially posing a threat to wildlife. Weather conditions at the time of application as well as temperature and relative humidity change the spread of the pesticide in the air. As wind velocity increases so does the spray drift and exposure. Low relative humidity and high temperature result in more spray evaporating. The amount of inhalable pesticides in the outdoor environment is therefore often dependent on the season. Also, droplets of sprayed pesticides or particles from pesticides applied as dusts may travel on the wind to other areas, or pesticides may adhere to particles that blow in the wind, such as dust particles. Ground spraying produces less pesticide drift than aerial spraying does. Farmers can employ a buffer zone around their crop, consisting of empty land or non-crop plants such as evergreen trees to serve as windbreaks and absorb the pesticides, preventing drift into other areas. Such windbreaks are legally required in the Netherlands.

Pesticides that are sprayed on to fields and used to fumigate soil can give off chemicals called volatile organic compounds, which can react with other chemicals and form a pollutant called tropospheric ozone. Pesticide use accounts for about 6 percent of total tropospheric ozone levels.

Read more about this topic:  Environmental Impact Of Pesticides

Famous quotes containing the word air:

    “His hope is treacherous only whose love dies
    With beauty, which is varying every hour;
    But, in chaste hearts uninfluenced by the power
    Of outward change, there blooms a deathless flower,
    That breathes on earth the air of paradise.”
    —Michelangelo Buonarroti (1474–1564)

    “People fall out of windows, trees tumble down,
    Summer is changed to winter, the young grow old
    The air is full of children, statues, roofs
    And snow. The theatre is spinning round,
    Colliding with deaf-mute churches and optical trains.
    The most massive sopranos are singing songs of scales.”
    —Wallace Stevens (1879–1955)

    “There is something about poverty that smells like death. Dead dreams dropping off the heart like leaves in a dry season and rotting around the feet; impulses smothered too long in the fetid air of underground caves. The soul lives in a sickly air. People can be slave-ships in shoes.”
    —Zora Neale Hurston (1891–1960)