VOA慢速英语:Scientists Study to Remove Carbon from the Atmosphere

geologist –n. a science that studies rocks, layers of soil, etc., in order to learn about the history of the Earth and its life​

mantle –n. the middle layer of the Earth that is between the top crust and the inner core​

plate tectonics –n. a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid plates that move slowly over the underlying mantle.​

layer – n. an amount of something that is spread over an area​

fossil fuel –n. a fuel (such as coal, oil, or natural gas) that is formed in the earth from dead plants or animals​

greenhouse gas –n. a gas that contributes to the greenhouse effect by absorbing infrared radiation, e.g., carbon dioxide and chlorofluorocarbons.

patterns - n. a repeated form or design especially that is used to decorate something​