Carbon Dioxide or CO2
Water vapor or H2O
Methane or CH4
More than 10%
2% to 10%
Less than 1%
Air pollution from factories, cars, and other means of burning fossil fuels
The greenhouse effect
Natural variations of the Sun's ouput of energy
The cause is unknown
YES, volcanic eruptions have increased over the last century contributing to more CO2 emissions
NO, volcanic eruptions have gone down overtime and therefore, CO2 amounts have increased b y human impact only
NO, the volcanic eruption data is too variable to make any logical conclusions
The recent accelerated rise in global temperatures are due to natural cycles of the Sun.
The recent, accelerated rise in global temperatures are due to human influence, mainly the burning of fossil fuels.
The rise in CO2 levels in the last one hundred years reveals we have had a tremendous increase in forest fires.
Only natural causes are contributing to rising global temperatures.
Volcanic emissions in the last thirty years have increased temperatures in the same time period.
Human causes (anthropogenic) for rising temperatures have had a more significant role in rising temperatures than natural causes in the last thirty years.
Volcanic and solar causes have not played any role in affecting temperatures over time.
Sea levels have not changed over time
Sea levels have been going up at the SAME RATE over time
While sea levels have been rising over time, the rate of rising has increased in the last fifty to seventy years
We should expect to see a drop in sea levels in the next ten years.
Both polar regions are experiencing increases in temperature.
The north polar region is experiencing greater increases in temperature than the southern pole.
The southern polar region is experiencing greater temperature increases than the north pole.
Rises in global temperatures could be a result of the increase in sun spots (or release of additional energy by the sun)
Rises in global temperatures could be a result of increases in volcanic activity.
Rises in global temperatures could be a result of humans burning more fossil fuels.