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.
Electricity can be produced using several kinds of renewable resources. Wind energy can produce electricity in regions where steady winds blow. Giant wind turbines capture the windâs energy and use it to power generators. Biomass is material that is formed from living organisms, such as wood or agricultural wastes.Biomass can be burned to produce electricity, or be converted to a gas and used for fuel.Geothermal energy uses hot water or steam from deep beneath the earthâs surface to produce electricity. Hydroelectric power plants use the energy of falling water to spin generator turbines.iant wind turbines capture the windâs energy and use it to power generators. Biomass is material that is formed from living organisms, such as wood or agricultural wastes. Biomass can be burned to produce electricity, or be converted to a gas and used for fuel.