1) an increase in the temperature of the air around the world because of pollution a) overpopulation b) global warming c) soil degradation d) waste disposal e) deforestation f) acid rain 2) rain that contains chemicals from pollution and damages plants, etc a) ocean acidification b) the nitrogen cycle c) climate change d) water pollution e) deforestation f) acid rain 3) the activity of changing the genes (= parts of cells which control particular characteristics) in the cells of plants or animals a) ozone layer depletion b) loss of biodiversity c) pollution d) urban sprawl e) genetic engineering f) overfishing 4) damage caused to water, air, etc by harmful substances or waste a) overpopulation b) natural resource depletion c) generating unsustainable waste d) pollution e) soil degradation f) global warming 5) a process in which all the trees in a large area are cut down a) waste disposal b) overpopulation c) deforestation d) overfishing e) polar ice caps f) the nitrogen cycle 6) the process by which nitrogen is exchanged between different living organisms on earth and between living organisms and the environment, for example when plants take it from the air and animals eat the plants a) public health issues b) genetic engineering c) loss of biodiversity d) the nitrogen cycle e) climate change f) global warming 7) changes in the world's weather, in particular the fact that it is believed to be getting warmer as a result of human activity increasing the level of carbon dioxide in the atmosphere a) global warming b) waste disposal c) polar ice caps d) ocean acidification e) climate change f) the nitrogen cycle 8) catching too many fish in an area of the sea, so that there are not many fish left there a) loss of biodiversity b) overfishing c) water pollution d) acid rain e) ocean acidification f) climate change 9) the process of becoming an acid or the act of making something become an acid a) acidification b) acid rain c) water pollution d) loss of biodiversity e) urban sprawl f) waste disposal 10) the spread of a city into the area surrounding it, often without planning a) overpopulation b) waste disposal c) genetic engineering d) urban sprawl e) deforestation f) polar ice caps 11) the fact of a country or city, etc. having too many people for the amount of food, materials, and space available there a) urban sprawl b) public health issues c) genetic engineering d) overpopulation e) the nitrogen cycle f) deforestation 12) removal, destruction or storing of damaged, used or other unwanted domestic, agricultural or industrial products a) pollution b) natural resource depletion c) generating unsustainable waste d) waste disposal e) the nitrogen cycle f) ocean acidification 13) process of ongoing decrease in the pH of the Earth’s oceans, caused by the uptake of carbon dioxide from the atmosphere a) water pollution b) acid rain c) polar ice caps d) ocean acidification e) the nitrogen cycle f) waste disposal 14) he worldwide extinction of different species, as well as the local reduction or loss of species in a certain habitat a) pollution b) deforestation c) loss of biodiversity d) overpopulation e) natural resource depletion f) soil degradation 15) the process that negatively affects the internal biophysics of soils and that does not allow the life support of ecosystems, in them is the way to accept, store and recycle water, organic matter and the nutrients a) water pollution b) pollution c) soil degradation d) natural resource depletion e) global warming f) overpopulation

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