No, not tower over New York. Global warming will certainly flood low-lying areas of New York.
They don't help with global warming naturally but the large buildup of greenhouse gases does assist with global warming.
Yes, Americans and most other nationalities are causing Global Warming.
Yes, global warming affects all countries with large population.
Global Warming is the gradual raising of the overall average temperature of the Earth. This seemingly small amount can equate to large effects to the icecaps, melting them. This can cause ocean levels rising.
To battle Global Dimming we could try to reduce aeroplane contrails and to be done on a Global scale we would see a large increase in Global Warming.
A sufficiently large nuclear war would not cause global warming. Instead it would cause a Nuclear Winter: massive global cooling due to enormous amounts of soot in the atmosphere. This would probably result in an ice age.
Global warming is dissolving the ozone layer. It causes ozone depletion at large scale.
The cause of global warming related indirectly with the use ("drilling") of Oil. If you use oil on ur machine, then it will emit a 'greenhouse' gas that will trigger the greenhouse effect thus creating the global warming.
... large contributor to global warming.
Large amounts of rainfall can cause problems because of flooding of forests and cities. Acid rain falling cause global warming problems.
Global warming it self as not as tress need CO2, but the fact that wood is need to burn is a large part of endangering pandas. (habitat distruction)
Global epidemic, the sun exploding, collosion with a black hole, global warming, global cooling, nuclear war, eruption of a super volcano, or a collision with a large enough meteorite or comet.