Great lakes pollution: Still dangerous.Focuses on the pollution of Great Lakes region. Effect of pollution on wildlife of the region; Health risks associated with eating fish from the region; Steps required to control the pollution in the region.EBSCO_AspNational Geographic...
The Great Lakes Forest was first published in 1983. The upper Great Lakes region is an area with a common natural and human history in which the forest has been a prime factor. Known as the Laurentian Mixed Forest in the United States (i... SL Flader - University of Minnesota Press 被...
C。解析:文章中提到“However, the Great Lakes face several environmental challenges. Pollution from industrial waste, agricultural runoff, and sewage has threatened the health of the lakes. Invasive species, such as zebra mussels and quagga mussels, have also caused significant damage to the ecosystem...
In1972, to reduce pollution in the Great Lakes, limits having been set by the United States and Canadaon the amount of phosphorus that could be discharged into Lakes Erie and Ontario. A. limits having been set by the United States and Canada B. limits set by the United States and Canada...
Many of the world’s big lakes are threatened by pollution or huge drainage schemes. But there is least one fairly bright spot. The Great Lakes and St. Lawrence river system between Canada and the United States, which together account for a fifth of the world’s non-polar fresh water, ...
Lakes also have the same problems. Lake Baikal in Asia was once the cleanest in the world, with over 700 different kinds of plant and animal life. Now, however, the waters of this great lake, which is also the world\'s deepest (over 1,740 metres), have been dirtied by ...
It may already be too late to save some rivers and lakes, butothers can still be saved if the correct action is taken at once.()51. Pollution in water is noticedA. when the first organisms are affectedB. when a great many fish and birds dieC. when poisons are poured into waterD....
, the state’s natural beauty stands out more for its valleys, rivers, lakes and mountains than its mere 13 miles of atlantic ocean coastline. its highest peak, mount washington, stands at 6,288 feet in the white mountains, and lake winnipesaukee is its best-known inland resort. , among...
The Great Lakes between the US and Canada are the largest bodies of fresh water in the world.For a long time,people lived happily beside the Lakes until the countries began to build factories along the shores.Pollution was killing the Lakes,Pretty soon,the Lakes’ ecosystem(生态系统)was not...
Lakes also have the same problems. Lake Baikal in Asia was once the cleanest in the world, with over 700 different kinds of plant and animal life. Now, however, the waters of this great lake, which is also the world's deepest (over 1,740 metres), have been dirtied by waste from a...