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CO2 emissions are directly responsible for climate change.

The Macquarie Dictionary defines the term "climate change" as- a significant change in the usual climatic conditions especially that thought to be caused by global warming. This 'climate change' can be caused by natural or human induced impacts. The global average temperature has risen by nearly a degree in the past 50 years. Scientists around the world have been recording temperature increases, raised ocean levels and melting of ice caps. All this is evidence that the earth is experiencing a "climate change". Many people believe that this change is primarily due to the fact that our CO2 emissions have created more greenhouse gases. They believe that there is a relationship between the rise in temperatures and the rise in CO2 emissions. Data shows an "association" between temperature levels and CO2 emissions but does not necessarily prove that increased CO2 levels are the most significant aspect of today"s climate change. For something complex like the weather system, many scientists are needed to unravel the story behind For something complex like the weather system, many scientists are needed to unravel the story behind climate change. While most scientists believe climate change occurs, not all agree on the extent and relevance of human activity as an influence on climate change. While major international climate agencies all emphasise the critical role of CO2 emissions in climate change, others are not so sure. For example, some scientists have conducted research that suggests that temperatures were higher than they are today, during the Roman and Medieval periods. These ancient civilisations would not have emitted CO2 emissions as we do today, so why did their temperatures rise? Temperatures have risen and fallen for a long time. The National Centre for Atmospheric Research (NCAR) states that climate change over the longer term is mainly due to the amount of sun energy hitting the Earth. Slight changes in the Earth"s orbit and changes in sun ray intensity, can alter the temperatures here on Earth. Even so, most scientists still emphasise the role of CO2 emissions in unprecedented, rapid global warming. The frank fact is that climate change cannot be stopped. It is completely natural.