The Earth is like our mother.She gives live to all the living things on the Earth.And she provice us with air、food、water and other things we need for living.Once she was beautiful ahd rich.But mow she is crying, becacuse she is becoming dirtier and dirtier, poorer and poorer. It'...
Thereareabout1.5millionkindsoflivingthingsonEarth,buthowmanydoyouseeeveryday?Youoftenseethebigcolourfulanimals,likebirds,rabbits,andfish.Butlookmoreclosely.Canyouseethesmallones,too?Insects(昆虫)makeup80percentofalltheworld'slivingkinds.Lookontheground. Imagineyoucouldlookundertheground,too.Manysmallliving...
Althoughwater covers 75 percent of the world's surface, 97.5 percent of the earth's water is salt water; of the remaining 2.5 percent, most is locked away as groundwater or in glaciers. What percentage of Earth is land? Less than 30%of the 510 million square kilometers of area on the...
5 million kinds of living things on Earth,but how many do you see every day? You often see the big colourful animals, like birds,rabbits, and fish. But look more closely. Can you see the small ones, too? Insects(昆虫)make up 80 percent of all the world's living kinds. Look on ...
How much freshwater is in groundwater? How deep is the groundwater table? What approximate percentage of the earth's freshwater is groundwater? How much water is under the Earth's crust? How much water is in the Earth's crust? How deep is an artesian well?
On average, about three new species of birds are found each year, and since 1990, 10 new species of monkeys have been discovered. Other groups are still far from being completely described: an estimated 40 percent of freshwater fishes in South America have not yet been classified. Scientists ...
Over 20 percent of the world's mangroves are estimated to have been lost over the past 40 years, the Food and Agriculture Organization of the United Nations said in a report last year. China is one of the few countries with a net increase in mangrove areas, now totaling 29,200 hectares...
There are about 1.5 million kinds of living things on Earth, but how many do you see every day? You often see the big colourful animals, like birds, rabbits, and fish. But look more closely. Can you see the small ones, too? Insects (昆虫) make up 80 percent of all the world's ...
The oceans hold about 96% of all Earth's water. Water will then evaporate from the ocean and later fall as rain or snow over land, replenishing freshwater supplies. These processes will repeat and interact, but the amount of water on Earth will always remain essentially constant. Water scarci...
The Scottish Government and Scottish Green Party have pledged to designate 10 percent of the country’s seas as Highly Protected Marine Areas, offering depleted ecosystems a chance to bounce back. It's a complicated task.