Is Global Warming a natural occurance or are we humuans the cause of it?

Question

if there are any scientists out there

Answer 1

By humans for the most part but oddly cows contribute a lot just by farting.  No joke.

Answer 2

It is caused by humans and producing ethanol(Or E85) is only making global warming worse!

Answer 3

Global warming is a natura occourance, but humans multiply global warming and the greenhouse effect with greenhouse gases. causing Enhanced GreenHouse Effect (search EGHE on google for more info),.

Thus making it warmer.

most (75%-80%) of scientists think by 2050, at this rate, WE WILL ALL BE KILLED BY GLOBAL WARMING AND EVERYTHING ON THIS PLANET...

...but it is not to late...

Answer 4

What little we know about the physics of the climate is overshadowed by political agendas.  The career of everyone at the IPCC and the existance of the organisation itself depends on climate change being caused by humans and also being a threat.  So many people and countries have a financle stake in regulating fossile fuels.  So many people just latch onto the idea of AGW because they want to believe it.

The truth is that we don't know what the truth is.  

I'm qute sceptical of the human caused climate change theory myself, the theory doesn't seem to fit real world data.

Answer 5

It happened time and time again, over and over and we had very little to do with it...  We can't control it and it is as natural as sunrise and sunset.

Answer 6

over millions of years ago, the world's weather started changing but because of human influence we speeded it up and now were creating a different enviroment and now most of the worlds habitat and ecology are suffering because its all happening to fast

Answer 7

It's natural. Weather is a cycle and the planet is a living thing.

They say that humans are speeding it up with our emissions and industry. But, isn't a fact of life that the world has to end sometime?

Answer 8

I doubt you'll find many climate scientists trolling these boards. Global warming is a natural occurence, where do you think the CO2 we release into the air comes from? From carbon stored in petroleum, coal and other products. If not for global warming by greenhouse gases (GHG) the global temp would be about 34C cooler, meaning Earth would be a frozen ball of ice. The main greenhouse gas is water vapor, CO2 makes up only a very tiny percent of the atmosphere, about .04%. Methane, nitrous oxide and other gases are far more potent for warming, yet all the talk is about CO2 because if they can control your CO2 emissions they can control everything you do every day. A politician's dream.

Not many people will question that CO2 is a greenhouse gas that "traps" infrared radiation emitted from the Earth or resulting from solar radiation. It's just that it's so weak they now have to claim some mysterious factor will "multiply" it's effect and that's how they arrive at such scary predictions. Only models show such predictions, look back and see how many of their predictions have come true. Not one.

I'll quote wikipedia to give you some idea of how precise our knowledge is. "The major greenhouse gases are water vapor, which causes about 36–70% of the greenhouse effect on Earth (not including clouds); carbon dioxide, which causes 9–26%; methane, which causes 4–9%, and ozone, which causes 3–7%." So water vapor is either 1/3 or twice as much, CO2 is either 9% or up to 26%. The wide range of these estimates shows you how little we know about GHG.

The IPCC discounts the impact of solar variability, yet if you look at records of solar output and sunspot activity you can see a correlation to Earth temp that isn't found by looking at CO2 levels. Maybe that's because it's harder to give the UN control over the sun.

Answer 9

it is natural but we are the ones who make it more dangerous.

Answer 10

Global temperature occurs in cycles that tend to correspond to solar activity:  There's an 11 year cycle, an 88 year cycle, and longer cycles.  

There isn't much we can do about solar cycles.

Recent studies have shown that 92% of global temperature can be attributed to two factors: sunspot activity and CO2, with sunspot activity having 27% greater impact than CO2.

Clearly it's a naturally occuring phenomenon, but given the role CO2 is playing in it, we humans are clearly making a significant contribution.

Answer 11

Global Warming is a World Disaster that is Man-made. People are causing massive pollution, cutting down forests and stuff and it causes the atmosphere to have holes and making the Earth hotter, and you know what? they are all doing it FOR THIER "OWN" GOOD!

Through these times people are being more selfish, more greedy and more Corrupted. And to cover it up, they call this era the era of "Globalization". But really, I think, Global warming is something caused by "Globalization" and the common selfishness of people.

And most people say, Globalization actually means "The extermination of Local Culture". People replace Bicycles, Horse Cariots with Cars. Okay, I no its not so bad, but people start thinking "thay need it, even if its beat up or Illegal". So, I ask every one, to SAVE THE WORLD!

Answer 12

I am a scientisit and global warming or cooling is not caused by humans.

Most climate changes are the result of increasing or decreasing solar activity.

Answer 13

global warming is a natural process tht increase the earth temp a lil every few years or so...but due to overpopu and deforestation and using of many things wich destroy Ozone and the environment-mostly the industries.....this phenomenon is rapidly occuring i.e earth is rapidly gettin heated up...

Answer 14

i'm not a scientist but it's a natural cycle - the world goes through periods of ice ages and warming over time. It's in  a document called "The Global Warming Swindle" and also "State of Fear" by Michael Crichton

Answer 15

Well, Global warming is both "man made" and "natural desarterous"

but MOSTLY man made.

Answer 16

im not a scientest

global warming is caused by humans

Answer 17

Climate change is a natural cycle of change for the earth, mostly recognised from the change in the earth's temperature - that's where the phrase "global warming" comes from and how things like Ice Ages occur. However, recent evidence (i.e. facts from the last 30-40 years) suggests that the lifestyles of the majority of humans are speeding up the process of climate change. When we produce things like carbon dioxide and methane - greenhouse gases - they are added to the layer of those gases around the earth. This makes them thicker, and when heat from the sun warms the earth and tries to bounce out again, the thickening of these layers mean that more of the heat is trapped inside the earth's atmosphere (much like a greenhouse keeps heat in, hence the name).

As we have started using more and more energy, and producing more of these greenhouse gases, the rate at which the layers thicken has increased, which means that we are trapping more heat on the earth faster than before. This is leading to an increase in the speed of climate change, and this can be stopped by more efficient uses of energy (e.g. less waste, therefore less use).

Climate Change is a naturally occuring state, this can't be stopped, but we can stop humans increasing the rate at which it happens. In the widest scheme of things it's no great problem if we don't, the world will always have ways to protect itself, but if we carry on acting in the way we have recently the world may protect itself by having an early Ice Age making humans extinct

Answer 18

Science Has Spoken:

Global Warming Is a Myth

by Arthur B. Robinson and Zachary W. Robinson

Copyright 1997 Dow Jones & Co., Inc.

Reprinted with permission of Dow Jones & Co., Inc.

The Wall Street Journal (December 4, 1997)

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Political leaders are gathered in Kyoto, Japan, working away on an international treaty to stop "global warming" by reducing carbon dioxide emissions. The debate over how much to cut emissions has at times been heated--but the entire enterprise is futile or worse. For there is not a shred of persuasive evidence that humans have been responsible for increasing global temperatures. What's more, carbon dioxide emissions have actually been a boon for the environment.

The myth of "global warming" starts with an accurate observation: The amount of carbon dioxide in the atmosphere is rising. It is now about 360 parts per million, vs. 290 at the beginning of the 20th century, Reasonable estimates indicate that it may eventually rise as high as 600 parts per million. This rise probably results from human burning of coal, oil and natural gas, although this is not certain. Earth's oceans and land hold some 50 times as much carbon dioxide as is in the atmosphere, and movement between these reservoirs of carbon dioxide is poorly understood. The observed rise in atmospheric carbon dioxide does correspond with the time of human release and equals about half of the amount released.

Carbon dioxide, water, and a few other substances are "greenhouse gases." For reasons predictable from their physics and chemistry, they tend to admit more solar energy into the atmosphere than they allow to escape. Actually, things are not so simple as this, since these substances interact among themselves and with other aspects of the atmosphere in complex ways that are not well understood. Still, it was reasonable to hypothesize that rising atmospheric carbon dioxide levels might cause atmospheric temperatures to rise. Some people predicted "global warming," which has come to mean extreme greenhouse warming of the atmosphere leading to catastrophic environmental consequences.

Careful Tests

The global-warming hypothesis, however, is no longer tenable. Scientists have been able to test it carefully, and it does not hold up. During the past 50 years, as atmospheric carbon dioxide levels have risen, scientists have made precise measurements of atmospheric temperature. These measurements have definitively shown that major atmospheric greenhouse warming of the atmosphere is not occurring and is unlikely ever to occur.

The temperature of the atmosphere fluctuates over a wide range, the result of solar activity and other influences. During the past 3,000 years, there have been five extended periods when it was distinctly warmer than today. One of the two coldest periods, known as the Little Ice Age, occurred 300 years ago. Atmospheric temperatures have been rising from that low for the past 300 years, but remain below the 3,000-year average.

Why are temperatures rising? The first chart nearby shows temperatures during the past 250 years, relative to the mean temperature for 1951-70. The same chart shows the length of the solar magnetic cycle during the same period. Close correlation between these two parameters--the shorter the solar cycle (and hence the more active the sun), the higher the temperature--demonstrates, as do other studies, that the gradual warming since the Little Ice Age and the large fluctuations during that warming have been caused by changes in solar activity.

The highest temperatures during this period occurred in about 1940. During the past 20 years, atmospheric temperatures have actually tended to go down, as shown in the second chart, based on very reliable satellite data, which have been confirmed by measurements from weather balloons.

Consider what this means for the global-warming hypothesis. This hypothesis predicts that global temperatures will rise significantly, indeed catastrophically, if atmospheric carbon dioxide rises. Most of the increase in atmospheric carbon dioxide has occurred during the past 50 years, and the increase has continued during the past 20 years. Yet there has been no significant increase in atmospheric temperature during those 50 years, and during the 20 years with the highest carbon dioxide levels, temperatures have decreased.

In science, the ultimate test is the process of experiment. If a hypothesis fails the experimental test, it must be discarded. Therefore, the scientific method requires that the global warming hypothesis be rejected.

Why, then, is there continuing scientific interest in "global warming"? There is a field of inquiry in which scientists are using computers to try to predict the weather--even global weather over very long periods. But global weather is so complicated that current data and computer methods are insufficient to make such predictions. Although it is reasonable to hope that these methods will eventually become useful, for now computer climate models are very unreliable. The second chart shows predicted temperatures for the past 20 years, based on the computer models. It's not surprising that they should have turned out wrong--after all the weatherman still has difficulty predicting local weather even for a few days. Long-term global predictions are beyond current capabilities.

So we needn't worry about human use of hydrocarbons warming the Earth. We also needn't worry about environmental calamities, even if the current, natural warming trend continues: After all the Earth has been much warmer during the past 3,000 years without ill effects.

But we should worry about the effects of the hydrocarbon rationing being proposed at Kyoto. Hydrocarbon use has major environmental benefits. A great deal of research has shown that increases in atmospheric carbon dioxide accelerate the growth rates of plants and also permit plants to grow in drier regions. Animal life, which depends upon plants, also increases.

Standing timber in the United States has already increased by 30% since 1950. There are now 60 tons of timber for every American. Tree-ring studies further confirm this spectacular increase in tree growth rates. It has also been found that mature Amazonian rain forests are increasing in biomass at about two tons per acre per year. A composite of 279 research studies predicts that overall plant growth rates will ultimately double as carbon dioxide increases.

Lush Environment

What mankind is doing is moving hydrocarbons from below ground and turning them into living things. We are living in an increasingly lush environment of plants and animals as a result of the carbon dioxide increase. Our children will enjoy an Earth with twice as much plant and animal life as that with which we now are blessed. This is a wonderful and unexpected gift from the industrial revolution.

Hydrocarbons are needed to feed and lift from poverty vast numbers of people across the globe. This can eventually allow all human beings to live long, prosperous, healthy, productive lives. No other single technological factor is more important to the increase in the quality, length and quantity of human life than the continued, expanded and unrationed use of the Earth's hydrocarbons, of which we have proven reserves to last more than 1,000 years. Global warming is a myth. The reality is that global poverty and death would be the result of Kyoto's rationing of hydrocarbons.

Arthur Robinson and Zachary Robinson are chemists at the Oregon Institute of Science and Medicine.

Answer 19

its natural but we humans are exacerbating it with excessive emissions in the environment

now say that 5 times fast :)

Answer 20

I think global warning is our human kinds the cause of it. There are many articles are published in Google Search. You can get thousands of answers of global warning of rapid changes of weather in different forms is caused by air pollution of carbon dioxide, sulfur dioxide emission by industry ans cars. Sooner or later Global warning will turn into global disasters to punish human kinds of curses from God by means of typhoon, tsunami, earth quark, drought, and chronicle diseases of cancer, asthma, lung and heart.

Hong Kong is rated as the most polluted city in this world and all causes are by the local people and its geographical location that trapped the Peral River Delta's industrial pollution and combined with local fossil fuel power generate stations plus car flow capacity of 400/km, making its air killed more than 20,000 annually caused by smoking, and other pollution related chronicle diseases.

   http://www.google.com.hk/search?complete...

Answer 21

i m not a scientist, its because of humans due to emission of green house gases like carbon dioxide, carbon monoxide, CFCs etc from various industries, cars etc