The Outer Space Treaty, which the United States signed in 1967, requires that the exploration of the moon and other "celestial bodies" be conducted "so as to avoid their harmful contamination and also adverse changes in the environment of Earth resulting from the introduction of extraterrestrial matter".
This is due to the introduction, in the environment, of toxic and dangerous contaminants for many organisms, including humans.
The procedure requires, prior to the first intentional introduction into the environment of an importing party: notification of the party of export containing certain information; acknowledgement of its receipt; and the written consent of the party of import.
Possibilities include changes in interactions between humans and the environment; introduction of serovars through transport of animals; evolution in distribution and/or abundance of animal reservoirs; and environmental changes that favour transmission of particular serovars.
The United States Environmental Protection Agency EPAA) has issued guidelines for introduction of genetically engineered (GE) species that state that GE organisms must: (a) Be contained to specific environments of introduction, (b) Not out-compete native species for resources, (c) Minimize foreign gene contamination (horizontal gene transfer) into native gene pools [ 8].
The delayed introduction of A(H1N1 pdm09 virus might primarily be explained by the isolated environment of the island; introduction would be mediated solely by visitors carrying the virus.
Student answers often directly tied trait variation to changes in the environment or the introduction of competitors or predators.
They exhibit so many complex phenomena that there is a wide range of research problems associated with them, including increased global awareness of the environment and the worldwide introduction of stringent combustion emissions regulations.
As an example of advanced testing in the field of metabolism in an industrial environment, the introduction of some novel approaches, including the use of genetically engineered cell lines for assessing CYP 2D6-related polymorphic effects is illustrated.
A second possibility is that selection acts at the moment of introduction into an environment.
