A cold is caused by one of many different viruses, some of which are airborne, but most are transmitted by hand-to-nose contact. Once the virus is absorbed by the nose, it causes the body to release histamine, a chemical which dramatically increases blood flow to the nose and causes nasal tissue to swell. This inflames the nasal membranes which become congested with blood and produce excessive amounts of mucus that stuffs up the nasal airway.
Biomass Energy. Biomass is organic material which has stored sunlight in the form of chemical energy. Biomass fuels include wood, wood waste, straw, manure, sugar cane, and many other byproducts from a variety of agricultural processes. Biomass is a renewable energy source because the energy it contains comes from the sun.
Biomass is just any material made by plants and animals that we can covert into energy. Biomass has energy stored in it from the sun. Plants get energy from the sun through a process called photosynthesis. Animals get their energy indirectly from the sun by eating plants.