expedition – n. a trip undertaken by a group of people for a purpose

benefit – n. a helpful or good effect

greenhouse gas – n. gases that cause a warming of the Earth's atmosphere

sediment – n. materials that collect at the bottom of a liquid

implication – n. a result or effect

preserve – v. to keep something safe from harm; to protect

manage – v. to have control of something, such as a business, department, organization, etc.