protect /prəˈtekt/ (verb) to make sure that somebody/something is not harmed, injured, damaged, etc. Example: Consumer laws are designed to protect the public against unscrupulous vendors
research /ˈriːsɜːrtʃ/ (noun) a careful study of a subject, especially in order to discover new facts or information about it Example: For toy manufacturers, research can be pure fun
pollution /pəˈluːʃn/ (noun) the process of making air, water, soil, etc. dirty; the state of being dirty Example: Water pollution is becoming more serious now.
reduce /rɪˈduːs/ (verb) to make something less or smaller in size, quantity, price, etc.; to become less or smaller in size, quantity, etc. Example: Doctors will always try to reduce the temperature of patients with fever.
fuel /ˈfjuːəl/ (noun) any material that produces heat or power, usually when it is burnt Example: Fuel supplies are nearly exhausted.
energy /ˈenərdʒi/ (noun) the strength, effort and enthusiasm required for physical or mental activity, work, etc. Example: I didn't even have the energy to get out of bed.
preserve /prɪˈzɜːrv/ (verb) to keep a particular quality, feature, etc.; to make sure that something is kept Example: He was anxious to preserve his reputation.
storm /stɔːrm/ (noun) very bad weather with strong winds and rain, and often thunder and lightning Example: A few minutes later the storm broke
volcano /vɑːlˈkeɪnəʊ/ (noun) a mountain with a large opening at the top through which gases and lava (= hot liquid rock) are forced out into the air, or have been in the past Example: This volcano hasn't erupted for years.
flood /flʌd/ (noun) a large amount of water covering an area that is usually dry Example: Last winter, the town suffered the worst flood in fifty years.
greenhouse effect /ˈɡriːnhaʊs ɪˈfekt/ (noun) Example: the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface. The destruction of forests is contributing to the greenhouse effect.
toxic /ˈtɑːksɪk/ (adjective) containing poison; poisonous Example: This site is used to dispose of toxic waste.
drought /draʊt/ (noun) a long period of time when there is little or no rain Example: A drought caused most of the corn crop to fail.
recycle /ˌriːˈsaɪkl/ (verb) to treat things that have already been used so that they can be used again Example: We can recycle waste paper.
rainforest /ˈreɪnfɔːrɪst/ (noun) a thick forest in tropical parts of the world that have a lot of rain Example: The Amazon rainforest is in Brazil.
reuse /ˌriːˈjuːz/ (verb) to use something again Example: These milk bottles can be reused.
earthquake /ˈɜːrθkweɪk/ (noun) a sudden, violent shaking of the earth’s surface Example: It is the most terrible earthquake I've ever seen.
tornado /tɔːrˈneɪdəʊ/ (noun) a violent storm with very strong winds that move in a circle. There is often also a long cloud that is narrower at the bottom than the top. Example: A lot of people died in the tornado yesterday.
climate change /ˈklaɪmət tʃeɪndʒ/ (noun) changes in the earth’s weather, including changes in temperature, wind patterns and rainfall , especially the increase in the temperature of the earth’s atmosphere that is caused by the increase of particular gases, especially carbon dioxide Example: In any case, climate change is already disrupting the lives of millions of human beings.
solar power /ˌsəʊlər ˈpaʊər/ (noun) energy obtained from the light and heat from the sun, used to produce electricity Example: Solar power is the conversion of the sun's energy into heat and electricity.
natural resources /ˈnætʃ.ɚ.əl rɪˈzɔːrs/ (noun) Example: Some natural resources, such as natural gas and fossil fuel, cannot be replaced.
global warming /ˌɡləʊbl ˈwɔːrmɪŋ/ (noun) the increase in temperature of the earth’s atmosphere that is caused by the increase of particular gases, especially carbon dioxide Example: Global warming is a term that refers to the general warm - up of the Earth and its atmosphere.
tsunami /tsuːˈnɑːmi/ (noun) an extremely large wave in the sea caused, for example, by an earthquake Example: A tsunami is a great wave or series of waves which extends from the surface water to the sea floor.
greenhouse gas /ˌɡriːnhaʊs ˈɡæs/ (noun) any of the gases that are thought to cause the greenhouse effect , especially carbon dioxide Example: Carbon dioxide is a so-called greenhouse gas, which absorbs energy from the sun, making the air warmer.
the ozone layer /ˈoʊ.zoʊn ˌleɪ.ɚ/ (noun) Example: The ozone layer protects living things from the harmful radiation of the sun.