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Humans cause climate changing

My response in the second round was that this Era STARTED 248 million years ago, as I thought that the time when it started is more important than the time when it ended, because he wrote about DURING the Mesozoic Era. (I wrote it to explain my response). Second, no matter whether it was 248 million years ago or 65 million years ago, the fact is that it was million years ago and climate changed during these long period of time. My opponent wrote "during the last 2 BILLION YEARS the climate in the Earth has been fluctuating between..." It shows that climate was changing not in short time such as 2000 years, it was changing during 2 BILLION YEARS, which is very long period. The fact is without humans affect, climate changes slowly, during billions of years. However, humans' affect changes the climate quickly. Look to the cite http://www.ncdc.noaa.gov... especially to the subtopic "Climate Model Indications and the Observed Climate". There is a chart where it is appeared how climate changes with and without humans affect. It proves that with humans affect climate changes quickly. There are more evidences of quickly climate changing: 1. Global sea level rose about 17 centimeters (6.7 inches) in the last CENTURY. The rate in the last decade, however, is nearly double that of the last century. It is changing during 100 years not billions of years. 2. All three major global surface temperature reconstructions show that Earth has warmed since 1880. Most of this warming has occurred since the 1970s, with the 20 warmest years having occurred since 1981 and with all 10 of the warmest years occurring in the past 12 years. Even though the 2000s witnessed a solar output decline resulting in an unusually deep solar minimum in 2007-2009, surface temperatures continue to increase. 3. The oceans have absorbed much of this increased heat, with the top 700 meters (about 2,300 feet) of ocean showing warming of 0.302 degrees Fahrenheit since 1969. 4. The Greenland and Antarctic ice sheets have decreased in mass. Data from NASA's Gravity Recovery and Climate Experiment show Greenland lost 150 to 250 cubic kilometers (36 to 60 cubic miles) of ice per year between 2002 and 2006, while Antarctica lost about 152 cubic kilometers (36 cubic miles) of ice between 2002 and 2005. 5. Both the extent and thickness of Arctic sea ice has declined rapidly over the last several decades. 6. The number of record high temperature events in the United States has been increasing, while the number of record low temperature events has been decreasing, since 1950. The U.S. Has also witnessed increasing numbers of intense rainfall events. 7. Since the beginning of the Industrial Revolution, the acidity of surface ocean waters has increased by about 30 percent. This increase is the result of humans emitting more carbon dioxide into the atmosphere and hence more being absorbed into the oceans. The amount of carbon dioxide absorbed by the upper layer of the oceans is increasing by about 2 billion tons per year. All these facts proves that during last century climate was changing a lot. The last century is about 100 years and it is really quickly. Before humans' industry climate was changing slowly during millions or even billions of year. That means people's affect is really big and dangerous. What will happen in the next centuries if such situation will continue? Next, my opponent wrote that climate and weather are different, also he gave the definition of the climate. "Climate is defined as: the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years". It means that WEATHER conditions in the certain period of time IS CLIMATE. It proves that humans' affect to the weather can change the climate, as weather influences to the climate and they are not so different. That means my argument in the second round about how people change the weather is RELEVANT to the topic. I wrote that China attacked to the bank of cloud to transform clear blue sky for the National Day parade, that has caused the big storm in the next days. It is not happened once, there are several other examples of it in America, too. I would like to say that all these transformations of the weather influenced to climate changing. Once weather was changed it affects to the weather in the next periods of time. The last Con's argument is that there are other things such as volcano, which produce CO2 more than humans. So, as he claimed a big amount of CO2 is not humans' fault. My response is that in the nature everything was balanced before industry. The certain amount of the CO2, which produces by volcanoes or other things, was removed by trees and by algae. However, since the industry appeared, a lot of factories, manufactures and a lot of vehicles were invented and amount of CO2 increases. Moreover, trees and algae that removes the CO2 were destroyed, burned and cut by humans. That means human increases the amount of CO2 and decrease the trees that removes CO2, so humans damaged the natural balance, as a result an amount of CO2 increased and it influences to climate's changing. Look to the cite http://climate.nasa.gov... There is a chart, which proves that for 650,000 years, atmospheric CO2 has never been above the certain line until 1950 year. It shows that amount of CO2 was once small, then was big, but the fact is that it was in balance in the certain amount, while since humans start to use factories and vehicles, CO2's amount increased a lot. That proves that humans affect to climate changing. In conclusion, I have clearly proved that attack to transform the weather can influence to the climate changing; that increasing of the amount of the CO2 during last years is a big problem that is caused by humans. Also, that the climate changing affected by humans is quicklier than the natural climate changing can be. So, humans are the main creature that influences to the climate and changes it. So, I am writing to everyone, think a bit about climate changing and its consequences. What will happen in the future if CO2 increase, sea level and global temperature rise, ocean acidification continues? Humans affects to these problems and, I believe, humans can stop them. Think about your future and the future of the next generation and stop damaging to the nature and to the climate. Thank you for attention.)) Also, thank you, my opponent. I had excellent experiences by debating with you. It was really interesting. http://climate.nasa.gov... http://www.ncdc.noaa.gov... http://www.enchantedlearning.com...