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.
Hydraulic fracturing, or fracking, forces natural gas and crude oil out of shale buried deep below the earth by using highly pressurized and treated water. Drillers seek out valuable crude oil, but natural gas comes out of the ground, too. Flaring is the burning of natural gas that can't be processed or sold.