to succeed or complete a goal.
(angiotensin-converting-enzyme inhibitor) drug used to combat high blood pressure and heart failure primarily by relaxing blood vessels and decreasing blood volume.
the art and science of cultivating the land for growing crops (farming) or raising livestock (ranching).
tributaries and drainage basin of the Amazon River.
hormone that regulates the constriction (narrowing) of blood vessels.
layers of gases surrounding a planet or other celestial body.
a dip or depression in the surface of the land or ocean floor.
all the different kinds of living organisms within a given area.
pressure exerted by blood on the walls of arteries.
series of processes in which carbon (C) atoms circulate through Earth's land, ocean, atmosphere, and interior.
area or ecosystem that absorbs more carbon dioxide than it releases.
gradual changes in all the interconnected weather elements on our planet.
management of a natural resource to prevent exploitation, destruction, or neglect.
U.S. land continuously stretching from the Atlantic to Pacific oceans (not including the states of Alaska and Hawaii.)
agreement or treaty on a specific matter.
international treaty to sustain and protect the diversity of life on Earth.
destruction or removal of forests and their undergrowth.
rapid depletion of plant life and topsoil, often associated with drought and human activity.
to scatter or spread out widely.
period of greatly reduced precipitation.
(1992) informal name for the United Nations Conference on Environment and Development, held in Rio de Janeiro, Brazil. Also called the Rio Summit.
capacity to do work.
conditions that surround and influence an organism or community.
to change from a liquid to a gas or vapor.
degree or space to which a thing extends.
process of complete disappearance of a species from Earth.
unusual or uncommon.
large public road.
forbidden by law.
area of land set aside by the government for exclusive use by an indigenous community.
to combine, unite, or bring together.
industry engaged in cutting down trees and moving the wood to sawmills.
means of mass communication, such as television or the Internet. Singular: medium.
substance used for treating illness or disease.
geographic area protected by the national government of a country.
drug or having to do with drugs and medications.
animal that is hunted and eaten by other animals.
people of a community.
area of tall, mostly evergreen trees and a high amount of rainfall.
not habitually used, but quickly available.
tributaries, mouth, source, delta, and flood plain of a river.
able to be touched or felt.
movement of people or goods from one place to another.
process in which there is an increase in the number of people living and working in a city or metropolitan area.
poison fluid made in the bodies of some organisms and secreted for hunting or protection.
snake with fixed fangs that secrete venom.