First Answer:
They complain that temperature monitoring stations are poorly sited.
They point out that not ALL the glaciers in the Himalayas are melting as fast as had originally been predicted.
Senator Inhofe had his children build an igloo in the Washington Mall, which they named "Al Gore's House." The unusually large local snowfall was taken as evidence global temperature had fallen.
Sometimes they may try to blame other factors for measured warming, instead of fossil carbon burning. For example, they may claim the sun is growing hotter. Solar output DOES vary, we have satellites (like SOHO-the Solar and Heliospheric Observatory) making careful measurements of solar output. These studies reveal a slight (unexpected) decline in solar radiation--to small to have any measurable impact on earth's climate.
They may suggest volcanoes emit more CO2 than humans. (It turns out this statement is just plain false).
Second Answer:
We should first establish what we mean by Global Warming. If we are referring to the overall warming of about 1 degree that man has seen since the low temperature of the mini ice age of 1850, we will find few that will dispute that issue. The warming itself though is not what Wiki Answers considers to be global warming. The definition that is being used here is the man made contribution to the current warming we have seen over this same period of time is what is used as the defining characteristic of what global warming is. This is otherwise referred to as Anthropogenic Global Warming. The evidence for natural warming is:
1. CO2 has never caused warming in the past. In fact every cooling cycle we know of started during periods of unusually high CO2 levels and every warming cycle.
2. Historical levels of CO2 are questioned. Over 90,000 measurements of CO2 levels of the 1800's showed that the normal levels of CO2 were often above 450 ppm. Levels today are 400 ppm. The change is below the possible tolerance of measurement.
3. UAH satellite measurements show the lower troposphere to have warmed a total of 0.11 degrees C compared to the average warmth of 1981. This is not out what the normal warming we would expect for the issue to be completely natural.
4. Much of the data used to "prove" man made warming is derived data, rather then naturally occurring data. For example, raw data show ocean cooling. Algorithms are installed to this data to show warming.
5. Some of data is just guessing or lies. The Himalayas are a great example. Total loss on this mountain range of ice is zero. The concept was a guess by a "scientist", not based on actual data.
6. Vostok data clearly shows that the current warming trend fits perfectly in the known Milankovich Theory. Milankovich did not use CO2 variances in his measurements or his theory. It was based completely on natural processes.
7. The current warming cycle also appears to have started 10,800 years ago, not in 1850 as some suggest.
8. The planet appears to have cooled for a brief period from 1934 until 1979 despite increases in CO2 production by man.
9. Man's overall contribution to the total green house effect is 0.28% of all annual green house gas production.
10. They point out that the Himalayas are not melting at all. In fact the only area that has any measurable decrease is due to tourism by individuals that are touring the glaciers. This as been made up by ice increases elsewhere.
11. The Antarctic ice has actually shown a slight gain in terms of total ice over the past decades.
12. Models showing warming have not ever been accurate as of this date. Predictions of warming have never hit predictions.
13. The IPCC willingly admits that they do not understand the affect solar variation has on the total warming issue.
14. They point out that the Himalayas have not experienced any melting and that the claim was based on absolutely no data. The offending contributor to the IPCC report confessed later that he made the claim knowing he was wrong.
This is not a comprehensive list. Just a very tip of the proverbial iceberg of issues that many have with the current debate.
There are people who don't believe global warming is happening.There are people who believe it is happening but don't believe that humans are causing it.There are people who believe all the climate scientists who believe it is happening and that we are causing it.
Global warming is the serious and rapid warming of the earth that has occurred in the last 100 years. Most people believe in it because science has shown that it is happening and people understand why it is happening.
I believe that some people misunderstand the science and this misunderstanding leads them to believe that trained research scientists must be wrong in their conclusions. In other cases, I believe that some people simply do not want to know that global warming is caused by human activities. Imagine for example someone who thinks that his job could be at risk if we try to prevent any further global warming: such a person would very probably deny the reality of global warming.
No. Global warming is certainly happening. Certain people who don't want to believe this seized on some emails and tried to beat them up into a story. This is where the term 'Climategate' came from. Several inquiries found there was nothing sinister in the emails.
Most people believe in the greenhouse effect, which is how the earth has kept warm enough for life for millions of years. Some people don't believe that global warming is happening. These (sweepingly) are sometimes the same people who do not trust their government and who do not believe that smoking causes cancer.
There are people who don't believe global warming is happening.There are people who believe it is happening but don't believe that humans are causing it.There are people who believe all the climate scientists who believe it is happening and that we are causing it.
People believe that man is causing global warming and climate change by burning fossil fuels and cutting down the forests of the world.Other people believe that global warming is a natural event and man is not causing it.Most believe that it is partially a natural issue that man is having some unknown affect on as well. This is where most scientists fall.Other people believe that global warming is not happening at all.
Global warming is the serious and rapid warming of the earth that has occurred in the last 100 years. Most people believe in it because science has shown that it is happening and people understand why it is happening.
Zero Percent of informed People.
There are quite a few people in the world who believe that Global Warming is indeed a legitimate problem. These people have followed scientific evidence. Another answer: There are also many who believe it isn't, including many top scientists. Example: The is no correlation of temps and co2 in the atmosphere, as claimed by alarmists. There has been no warming at all since the late 90's.
People are free to choose whether to believe that global warming is real, and no one says that they must believe the scientific evidence for global warming. However, those who wish to be informed would note that there is a strong scientific consensus that this is the case. Also, people who accept the reality that global warming is happening are the people who will be able to provide the leadership needed to solve the problem.
People who don't believe science.
because some people dont believe in global warming
If you mean that global warming is a fact, yes there are plenty of people that don't believe it. A recent poll conducted in the U.S.,said that only 41 per cent of the responders believed in global warming.
Global warming is not natural, it is caused by people. Since there aren't people on Neptune, it cannot have global warming.
They believe the scientists have clear evidence that it is happening.They believe the governments who have signed up to reduce carbon dioxide emissions.They see the evidence with their own eyes that the climate is changing, glaciers are melting, the Arctic is ice free for longer summers each year.
no. and that is the problem. There are kinds of people: People who don't understand and people who don't WANT to understand. People who don't want to understand can make up lies, like Global Warming is a theory. They can also fight with climate scientists . There is a point in humanity that we are in right now. we need to stop global warming, we are now in the point where we can't undo global warming, only stop it from getting worse. We need to.