the continuous modification and adaption of organisms to their environments through selection, hybridization, and the like

no longer existing, as an animal species

the warning trend on the surface and in the lower atmosphere of a planet, held by scientists to occur when solar radiation is trapped, as by emissions from the planet

the natural environment of a plant or animal

a substance used to kill insects

the mass of gasses surrounding the earth or any other celestial body.

oxygen in the form of molecules with three atoms, created by exposure of oxygen to electrical discharge or ultraviolet radiation, having a sharp smell, and being an effective oxidant for use in bleaching and sterilizing

one who illegally hunts on another's property

contaminating material that pollutes

a haze caused by the effect of sunlight on foggy air that has been polluted by vehicle exhaust gases and industrial smoke

the part of the earth and its atmosphere in which living organisms can exist

the act of preserving and protecting from loss, destruction, or waste