The above report offers abundant data upon recent volcano eruptions. ... In areas around active volcanoes forests have been noticed to die out. ... There is evidence that central India used to be covered with dense forests before the eruption. After it the forests were replaced with open grassland. ... Its effects include obscuring the light and reducing visibility, covering the roads making them hard to pass, clogging engines,damaging vehicles and other equipment by abrasion, breaking down buildings by placing excessive weight on the roofs, covering farmland, and shutting down power system...

• Word Count: 1248
• Approx Pages: 5
• Has Bibliography

Ultraviolet light affects humans adversely in two specific ways: by damaging the retina, and by altering skin cells so that they become cancerous. ... Dangers of Ozone Depletion Ultraviolet light consists of the "fastest-moving- photons: this refers to their periodic or wave-like speed rather than their objective speed, which, like all other wavelengths of light, is around 3x108 m/s. ... The human body has a system in place to protect somewhat against ultraviolet light, which involves the release of melanin and pigments into the epidermis. This blocks most UV light from reaching cells deep...

• Word Count: 1616
• Approx Pages: 6
• Grade Level: Undergraduate

Atmospheric Structure The gaseous area surrounding the planet is divided into several concentric spherical strata (31k jpeg) separated by narrow transition zones. The upper boundary at which gases disperse into space lies at an altitude of approximately 1000 km above sea level. More than 99% of the total atmospheric mass is concentrated in the first 40 km from Earth's surface. Atmospheric layers are characterized by differences in chemical composition that produce variations in temperature. Troposphere The troposphere (14k jpeg) is the atmospheric layer closest to the planet and c...

• Word Count: 2950
• Approx Pages: 12