ETrees are of great importance when it comes to maintaining topsoil and slowing down the wind speed. In many Asian countries, firewood is the chief fuel used for cooking and heating, which has caused uncontrolled clear- cutting of forests in dryland ecosystems. When too many trees are cut dow...
问题2:Now, the Earth faces many environmental issues. Forests are being cut down, rivers are polluted, air quality has declined, biodiversity has decreased, and climate change has intensified. Human activities have put enormous pressure on the natural environment, and the Earth's health is a ...
Bonsai trees can vary in price depending on the species of plant, its age and its artistic or aesthetic value. Many of the most valued bonsai plants are never offered for sale, but pass privately from hand to hand. When you shop for bonsai, you will probably have a selection of...
According to the writer, people can benefit from planting trees in aspects. A. many B. some C. two D. several 相关知识点: 试题来源: 解析 7.选A 细节理解题。 根据第二段的最后一句“The more carbon dioxide in the atmosphere, the warmer the planet will become."可知,导致全球变暖的原因...
Today things are different. The world has become too crowded. We are using up our natural resources,and polluting our environment with dangerous chemicals. If we continue to do this, human life on earth will not survive. We realize that if too many fish are taken from the sea, there...
on which our economies have always been based, is suddenly threatening our existence. All we hope that is this overpopulated, over industrialized planet can carry on for a longer time. And maybe, it’s time for us to realize that we should protect the earth, stop cutting down trees blindly...
How Will Global Warming Change Earth?The impact of increased surface temperatures is significant in itself. But global warmin will have far -reaching effects on the planet. Warning modifies minfall patterms, amplifiea coastal erosion, lengthens the growing season in some regions, melts ice caps ...
Trees are our friends. They are very useful to humans. Firstly, trees provide us with wood which can be made into paper ,rubber and pencils. And many trees provide us with fruits such as oranges, apples and peaches. Secondly, their roots can keep the rain, prevent droughts ...
It is also a globally important biome(生物群落)containing about 18 percent of all trees on Earth and carrying more fresh water than the next seven largest river basins combined. Researchers have long wondered and hotly debated how the Amazon's rich biodiversity arose and accumulated."Early ...
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