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Conservation biologyGlobal warmingand Human impact on the environment Humans play a key role in the biospherewith the large human population dominating many of Earth's ecosystems. Novel species may also emerge; in particular taxa that prosper in human-dominated ecosystems may rapidly diversify into many new species.
Microbes are likely to benefit from the increase in nutrient-enriched environmental niches. No new species of existing large vertebrates are likely to arise and food chains will probably be shortened. From the perspective of humanity, these can be subdivided into survivable risks and terminal risks.
Risks that humanity pose to itself include climate change, the misuse of nanotechnologya nuclear holocaustwarfare with a programmed superintelligencea genetically engineered disease, or a disaster caused by a physics experiment.
Similarly, several natural events may pose a doomsday threat, including a highly virulent disease, the impact of an asteroid or cometrunaway greenhouse effectand resource depletion. There may also be the possibility of an infestation by an extraterrestrial lifeform. The last surviving structures would most likely be open pit mines, large landfills, major highways, wide canal cuts, and earth-fill flank dams.
A few massive stone monuments like the pyramids at the Giza Necropolis or the sculptures at Mount Rushmore may still survive in some form after a million years.
Impacts from these comets can trigger a mass extinction of life on Earth. These disruptive encounters occur at an average of once every 45 million years.
This can be taken as an indication of the low likelihood of such an event occurring during the lifetime of the Earth. This matches the geologic record of significant extinctions during the Phanerozoic Eon. Such events can be expected to continue into the future. Within the Milky Way galaxysupernova explosions occur on average once every 40 years.
Explosions inside this distance can contaminate the planet with radioisotopes and possibly impact the biosphere. These molecules cause a depletion of the ozone layer that protects the surface from ultraviolet UV radiation from the Sun. This does not significantly affect the stability of the Solar System over intervals of a few million years or less, but over billions of years the orbits of the planets become unpredictable.
There is a remote chance that the Earth will instead be captured by a passing binary star system, allowing the planet's biosphere to remain intact. The odds of this happening are about one chance in three million.
These changes can influence the planetary climate. In all 1, simulations, the planet's semimajor axiseccentricityand inclination remained nearly constant.
Ice ages may occur because of changes in ocean circulation and continentality induced by plate tectonics.Only 12 years elapsed between the launch of Sputnik and Neil Armstrong's "one small step" on the moon. Many of us then expected a lunar base, even an expedition to Mars, within 30 years. Earth’s Moon The Earth’s Moon is the most important moon in the solar system in regards to Earth and all of the living things within it.
It is also the only Moon that Earth has, whereas other planets, like Mars, have multiple Moons. words essay on the moon Subhasish Advertisements: The moon is nearest to the earth.
It has no light of its own. It shines with the reflected light of the sun. People in the past thought that the moon was a goddess and they worshipped it as such.
It is a huge globe similar to the earth, but much smaller than it. The Future of Planet Earth Uploaded by srheric on Apr 23, The Future of Planet Earth Americans have increasingly divulged themselves in over-consumption. This escalating desire for physical goods is initiating the depletion of our resources and the destruction of our environment.
The moon is nearest to the earth. It has no light of its own. It shines with the reflected light of the sun. People in the past thought that the moon was a goddess and they worshipped it as such. It is a huge globe similar to the earth, but much smaller than it.
It shines at night when the sun is off duty. It sheds light which is cool and refreshing. The moon is a symbol of the future of space exploration and of one of the greatest achievements humanity has ever had. It is seen by everyone at night that looks up in the sky.
It is seen by everyone at night that looks up in the sky.