Cradle-to-grave solar panels are not as 'green' as we are led to believe.
, this is one of the most abundant materials on Earth. In most cases, the raw source of silicon is a mineral called quartz.
. It is important to note that this material is used for many types of electrical components, but is a major constituent of solar panel production. This metric is a measure of the kilograms of CO2 emitted by kilowatt-hour of electricity. This value varies per country, with places like China having double that of, say, the United States. If panels were made in China and installed in China, the payback is relatively quick, if, however, the panels are made in China, then shipped to the U.S., the payback is considerably longer . If PV panels are made using low-carbon electricity, the payback is obviously a lot faster.
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