denying the problem in his first term and avoiding it in his second, Schwarzenegger has signed agreements with Canada, Mexico and the United Nations encouraging cooperation on clean technology, while pushing greenhouse-gas reductions at home. He also has enacted the first statewide cap on carbon emissions, the first statewide green building code and the first statewide fuel-efficiency ...
plants, and inhabit the waterways and shores of Florida. Other species are found in the Indian ocean and the Gulf of Mexico. They are slow creatures, and are in danger of extinction due to careless boaters. Most manatees have boat motor scars on their backs.Sea Otter (Enhydra Lutris)These adorable animals were once hunted to the brink of extinction for their fur. Inhabiting the coastal waters ...
dust sent up by human activity, dust storms and volcanic activity.Geologist Frans Rietmeijer, of the University of New Mexico, explains that dust enters the stratosphere from active volcanoes, aerospace activities and outer space. With balloons, aircraft and spacecraft, scientists have been collecting and analyzing stratospheric dust for decades.The dust from volcanic eruptions (five major ...
caudatum has no nervous system. Gary M. Malving and Stephen C. Wood, at the Lovelace Medical Foundation in New Mexico, have discovered that under conditions of hypoxia(oxygen deficiency) this one-celled creature goes to live in the low temperature side of a container. Hypothermia enables the protozoan to survive.In humans, hypothermia is sometimes induced medically to protect against hypoxia, ...
a volcano compared to those in Japan and the Philippines, is also a product of the Ring of Fire. There are others in Mexico and Central America.The largest volcanic explosion in modern times occurred in 1815 when Mt Tamboro in Indonesia blew its top so thoroughly that cubic miles of dust were fired into the stratosphere and remained there for several years before settling. Beautiful sunsets ...
so. In the autumn, many thousands of monarchs gather in the United States and set out in a flight southward to central Mexico. In the spring they return northward, or, at least, they try. They stop to lay eggs and, after that, they usually die. The new generation that develops then continues to fly north to their summer area, and does so without guidance.How a small creature like a butterfly ...
가능할 수도 있지 않을까?It may be that, almost a thousand years ago, a tribe of Native Americans in New Mexico saw a star that European astronomers unaccountably missed. At least that is something that Ralph Robbins and Russell Westmoreland of the University of Texas now believe, after studying a burial bowl that was uncovered about 50 years ago.The star in question was a supernova ...
floor of the Gulf of Mexico. From his studies, he concluded that were was a period, 11,000 years ago, when the Gulf of Mexico contained water that was much less salty than it is today. he suggested that the ice-sheets had undergone a sudden melting and that a vast flood of water had entered the Gulf of Mexico, and raised the sea level markedly.The suggestion was largely ignored because it was ...
하는 초현대식 시설이다.호수 속의 작은 섬에 건설된 멕시코시스페인어로 '메히코'(Mexico) 또는 '시우다드 데 메히코'(Ciudad de mexico)라 부르는 멕시코공화국의 수도 멕시코시는 교외를 합한 연방구의 총인구가 1천7백만명에 이르며 멕시코 중부 '아나와크'고원 중앙부의 표고 2천2백40m 높이에 위치하는 ...
which lost 5,000 people to one that was not very close by in 1985. By the year 2000, the number of people at risk in Mexico City will be perhaps 25 million.This can be repeated for any of a hundred cities, with a total population of perhaps 290 million at risk in the year 2000. The mind boggles at what might happen.2) If we can't help having cities in dangerous areas, can we construct them so ...
동아사이언스
디라이브러리
DS스토어
팝콘플래닛
