Geography Notes

Geography Notes - Some electrons are displaced from the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
World Geography Notes September 13, 2011 Annual Temperature Range: - Range is highest in interior of high-latitude continental regions - Lowest in tropics Global Warming: - Main Culprits: - Carbon dioxide 64 % - Methane - CFCs - Nitrous oxides If it continues: (Computer Modeling) - Heat and drought in middle latitudes - Milder temperatures in higher latitudes - Some arid lands may see more rainfall - Ice caps would melt/sea level would rise/displaced populations - Incredibly difficult to model Solar Energy - Photovoltaic Cells o Silicon added to increase conductivity o How they work: Photons (particles of light) strike the silicon cell’s surface
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Some electrons are displaced from the circuit’s negative layer Flows into positive layer –> electrical current o Advantages: Low capital cost Low maintenance Virtually no pollution Do not have to be wired into a grid Needs a lot of space o Disadvantages: Low efficiency • Lots of energy lost as heat Lessened by cloudy and hazy conditions Cannot keep it going at night o New technologies being developed: Mirrors and lenses to better focus sunlight Multispectral PV cells Organic elements • Thin, flexible, sometimes transparent materials...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online