The actual evidence for global warming (GW) itself over the last century is thin but it could exist.
Alexander contradicted Schmidt, saying that he thought it could exist, but punted on the second question about definition.
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Astrobiologists like the idea that life can be built with a completely different set of chemical building blocks because it means that life could then exist in all sorts of places that Earth-based living things would find intolerable.
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Could it even be said to exist?
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SNH, which is involved in a trial reintroduction in Argyll, said it could not scrap something that did not exist.
It's certainly true that we produce in order to consume, but since no entrepreneurs exist without capital, it could be argued that our obsession with cosmetic and mental wellness subtracts from the base of capital in economically harmful ways.
It was as if neither vision of childhood could exist in New York at the same time.
Recent pictures from it suggest that water might exist just below the surface and could still emerge on to the Martian surface as springs.
The music of Johann Sebastian Bach is so great, so well-structured, that it can exist in all kinds of styles, even styles that Bach could never have imagined.
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Some have taken it a dramatic step further, suggesting there could come a time when football ceases to exist, that a trickle down of safety anxiety and liability concerns will unravel the game.
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This category shouldn't exist, according to standard economic theory: If you really liked it and could afford it, you'd buy it.
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It is understood that envelopes from the letters may still exist - raising the possibility they could provide a DNA profile of the hoaxer through saliva traces.
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The report notes that the findings did not mean that the equipment did not exist or was not "being used usefully somewhere" - as it could be difficult keeping track of assets being used in war zones.
Perhaps it could be focused in the near term on other specific uses of e-commerce for functions that already exist in Facebook, such as Facebook Groups.
Even though spiders like it exist in the UK, there are no plans to release it into the wild because it could come from somewhere like South America.
The U.S. could be overflowing with energy resources such as crude oil and natural gas, but several barriers exist when it comes time to drill and transport the supply.
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