Gasoline, or petrol, is a fossil fuel. When it is burned it releases carbon dioxide (CO2). This CO2 is not part of the normal carbon cycle which moves carbon in and out of the atmosphere. This is CO2...
No, but major volcanic eruptions have been known to cause global cooling because of the large amounts of ash they throw into the atmosphere, reducing solar radiation. from someone else.... volcanoes...
This would depend on what you are considering global warming. The natural portion of global warming has absolutely nothing to do with population. There is another theory though, called enhanced...