In general, irregular periods are very common during the perimenopause. The most common early menstrual irregularity noticed in the perimenopause is a shortening of cycle length.
Abiogenic petroleum origin. Abiogenic petroleum origin is a term used to describe a number of different hypotheses which propose that petroleum and natural gas are formed by inorganic means rather than by the decomposition of organisms.
NATURAL GAS. Natural Gas (NGAS) is a fossil fuel formed from plants and animals buried underground and exposed to extreme heat and pressure. Natural gas is used domestically for cooking, as a power source, in agriculture, and in industrial manufacturing. Natural gas prices fluctuate constantly depending mainly on production issues, stockpiles, weather conditions, economic growth, crude oil prices, and more recently coal.