There are several ways to preserve natural resources on earth. 26 environmental pollution and global warming are concerned, taking public transportation, such as the MRT, buses and trains, is one of the feasible measures to 27 the emission of greenhouse gases. Planting more trees is also an effective way, which can absorb carbon dioxide and slow down the speed of global warming. To reduce energy consumption, people need to make a habit of turning off the water faucets and plugging off all the electrical 28 when they are not in use. Turn on air conditioners only when needed. 29 is also a crucial measure; containers like glass bottles, plastic bottles and aluminum cans can be reused. The more we recycle, the less trash we will make. To protect the 30 species on earth, we can stop buying products that harm the animals, for example leather bags or clothing, and stamps or ornaments that are made of elephant tusks. Without the purchases of the valuable merchandises, manufactures would cut down the production, and slaughter less precious animals. 【題組】30.
(A) endangers
(B) endangering
(C) endanger
(D) endangered
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