Whois & Analysis for air-matters.com

Pollen is a fine to coarse powdery substance comprising pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells).

Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants or from the male cone to the female cone of coniferous plants.

If pollen lands on a compatible pistil or female cone, it germinates, producing a pollen tube that transfers the sperm to the ovule containing the female gametophyte.

Individual pollen grains are small enough to require magnification to see detail.

The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archaeology, and forensics.

Air pollution occurs when harmful substances including particulates and biological molecules are introduced into Earth's atmosphere.

It may cause diseases, allergies or death in humans; it may also cause harm to other living organisms such as animals and food crops, and may damage the natural or built environment.

Human activity and natural processes can both generate air pollution.