Once a volcano erupts, gases are emitted and released into the atmosphere. During large eruptions, gases have actually caused global climate change. In other systems, gases are emitted continuously into the atmosphere from soils, volcanic vents, fumaroles and hydrothermal deposits.he spectrometer is designed to measure the concentration of sulfur dioxide (SO2) in the volcanic plume that is emitted from the volcano. The device requires a standard, from which to analyze the ultraviolet light absorbed by the SO2 molecules in the plume.
Once you've done that, shred the paper documents (to avoid ID theft) or securely trash electronic files unless you need them to support your tax return. Keep insurance policies and investment statements until new ones arrive. Keep for a year or more. You'll want to hold onto loan documents until the loan is paid off.
It is important to keep these documents because they support the entries in your books and on your tax return. You should keep them in an orderly fashion and in a safe place. For instance, organize them by year and type of income or expense. The following are some of the types of records you should keep: 1  Gross receipts are the income you receive from your business. You should keep supporting documents that show the amounts and sources of your gross receipts. 2  Purchases are the items you buy and resell to customers.