the face of the Earth. Realistic or not? You decide.Synthetic treesLiving trees absorb carbon dioxide slowly. Scientists are proposing to build synthetic trees, which would not grow or produce leaves ……

, the Earth is changing. It has too much garbage and too much pollution as well as other... to drink.What’s more, overusing resources seriously affects the Earth. People cut down a lot of trees ……

effect: Humans’ influence on the greenhouse effect:Human activities are changing Earth’s natural.... This causes Earth to warm up.Human activities are changing Earth’s natural greenhouse effect. Burning ……

will no longer be necessary one dayB. by changing their DNA, rubber trees end up with no weaknessesC. one day rubber trees will grow well in spite of bad weather conditions and diseaseD. changing the DNA ……

families.Wonderful forestsHALF of the earth's animals and plants live in rainforests. Trees... the top of the trees.But rainforests cover only 7 per cent of the earth. They are getting smaller ……

善待地球，从我做起。ALL living things share a common home: the Earth. As human beings, though, we have a responsibility (责任) to make this home a better place.April 22 is World Earth Day. It’s a day for us ……

devoted their lives to planting trees. They were given the “Touching China” award. As a result of their effort, the mountain became greener. These people will die one day, but the trees they planted ……

Dinosaur snackMILLIONS of years ago,ginkgo(银杏) trees started to live on the earth. That was also when large numbers ofdinosaurs(恐龙) lived. Many dinosaurs ate leaves and fruits from ginkgo trees ……

its face to Earth to listen.1. A. enough          B. far .... Rainforests can speed up climate change. C. The Amazon will have few trees in the future.D. Many ……

.Every year there is a special theme, and this year it is “Trees for Earth”, so Earth Day will be all...地球日：为地球种下一片绿荫。“WHEN it comes to Earth, there’s no time to waste,” says the Earth Day Network ……

trees.A. Cutting off the branches of female trees.B. Planting more male trees.B. Planting more male trees.C. Planting more female trees.C. Planting more female trees.D. Changing the gender ……

Ancient trees are like living fossils (化石) – they’ve been on Earth for a very long time.However, old trees have been endangered for a long time. In fact, more than 90 percent of the Earth’s oldest ……

Ancient trees are like living fossils (化石) – they’ve been on Earth for a very long time.However, old trees have been endangered for a long time. In fact, more than 90 percent of the Earth’s oldest ……

新型"固体水"巧妙灌溉植物CHINESE scientists have developed a kind of "solid water" that can be used for planting trees in deserts. The "solid water" can be placed deep in the earth with the root of a plant ……

outside and smoke (烟) is around, we close the doors and windows. Trees do this, too. They have small holes in their leaves. Usually, trees use them to breathe (呼吸). But during a big fire, some trees close ……