No. While global warming might affect tornado activity, tornadoes themselves are an end product of weather and climatic activity, not a cause.
So far no conclusive link has been found between tornadoes and global warming. Extra heat in the atmosphere is a form of energy, and energy drives tornadoes. Scientists predict that global warming will cause more frequent and more severe "weather events". Climate, however, takes time to change so it is unclear yet what is happening.
Global warming does not cause tornadoes. Tornadoes will happen with or without it. The argument that some use is that a warmer climate means that more energy is available for storms and thus more tornadoes. This is grossly oversimplified. A complex set of conditions are needed for tornado activity, especially significant activity. There are many variables. Raising average global temperatures will affect all of these variable in some way or another and will affect them differently in different regions in ways that are hard to predict. In all likelihood, global warming would result in an increase in tornado activity in some regions and a decrease in others.
Yes, it is. It is responsible for global warming.
Global warming is a cause of the ozone depletion. However it is not the main cause of it.
There is no such thing as "a global warming" global warming only happens to earth because human and our unruly decrease in the earths resources. HUMANS cause global warming.
No. While events on the earths crust can cause global warming, the crust itself does not.
No.
Greenhouse gasses are the cause of Global Warming.
The main cause of thinning is CFC's. Global warming also affects it.
Polar bears do not cause global warming. In fact, polar bears are affected by global warming due to the shrinking of their sea ice habitat. The loss of sea ice reduces their hunting grounds and threatens their survival.
Global warming is unlikely to cause avalanches directly. They are usually caused by runoff from heavy rain and intense storms. Global warming is expected to cause more intense storms and could therefore be an indirect cause of avalanches.
Ozone depletion causes global warming. This then causes global temperature to change.