acid rain - the rain that contains dissolved nitric oxides or sulfur dioxide., asthma - An allergic reaction that causes a person to have difficulty breathing., atmosphere - The mixture of gases surrounding the Earth., bronchitis - A lung infection that can be caused by polluted air., compost - Rotted vegetables and garden waste that is used as a fertilizer., deforestation - Removal of trees by humans. , desert - Regions with very little rainfall., environment - Our natural surrounding, global warming - The gradual increase in temperatures throughout the world., pollutants - Substances which cause pollution, pollution - Making the environment dirty with waste product, recycling - To re-process something and make into a new product, greenhouse gas - A gas that traps heat causing the temperature of the atmosphere to rise, food chain - A way to describe the feeding relationship between plants and animals,

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