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.
The Important Documents You Need to Keep. Depending what type of documents you're dealing with, you need to store some of them for certain periods of time, others you can digitize, and others you can throw away. Let's start with the documents you need to keep physical copies of forever: 1  Birth and death certificates. 2  Social security cards. 3  Pension plan documents. 4  ID cards and passports. 5  Marriage license. 6  Business license. 7  Any insurance policy (good to keep even if they have a digital copy in case problems come up).