globalisation - increasing business, cultural and other contacts between countries, acid - a type of liquid that reacts chemically with other materials, sometimes dissolving them, acid rain - rain which contains harmful chemicals as a result of burning substances such as oil and coal, air pollution - damage caused to the air by harmful substances or waste, global warming - rise in the world’s temperature, hazardous - dangerous, ozone depletion - reduction in the ozone layer (layer of air above the Earth containing ozone which prevents harmful ultraviolet light from the sun from reaching Earth), smog - air pollution found in cities caused by a mixture of smoke, gases and chemicals (the word has been formed from smoke + fog), rainforest destruction - destroying (cutting down) forest from smoke + fog) in a tropical area which receives a lot of rain, atmosphere - the mixture of gases around the Earth, polar ice caps - ice covering the areas at the North and South Poles, species - types, endangered - very few in number, at risk of becoming extinct, extinct - not existing any longer, deforestation - the purposeful clearing of forested land,

Environmental problems

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