Energy cannot be created or destroyed. it can only be transferred from one form to another. energy that is "wasted," does not disappear. instead, it is transferred to its surroundings and spreads out so much that it becomes difficult to do anything useful with it. incandescent light bulbs are very inefficient in energy transfer. energy-saving lightbulbs, such as fluorescent bulbs transfer a greater proportion of electrical energy as light energy. in fluorescent bulbs what kind of energy is "wasted" in the energy transfer from electricity to light?

The roman empire fell around the 5th century, and as islam spread in the 7th century, trade between europe and china slowed. chinese traders were blocked from westward expansion into europe when the chinese army was defeated by muslim fighters in the area known as syr darya. the trade routes, known as the silk road, fell into disuse, and trade between the far east and europe nearly stopped. it wasn't until the 13th century when the mongols invaded and controlled central asia and large parts of the middle east that extensive trade along these routes was opened again. based upon the paragraph above and your knowledge of the mongols, which of the following statements is correct? a. the mongols unified regions along the silk road, allowing for safe transport of goods. b. muslims controlled busy trade routes into china from the 5th to the 7th centuries. c. without access to european markets, the chinese were unable to obtain raw materials. d. the mongols replaced the roman empire as the dominant force in western europe.

Iwill give anyone points if they me right now q: sustainable development is related to pollution in that a. sustainable development allows pollution to continue at current levels. b. sustainable development increases pollution of all types. c. addressing pollution is a factor in sustainable development. d. sustainable development incorporates pollution as a benefit. e. pollution levels will decrease with development.

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