Why is Global Warming and the greenhouse effect happening ?

Question

why ?how?when? why do we have to be concerned ?

Answer 1

Natural cycles in the earths temperature, caused by wobbles on the axis rotation, Flight path of revolution around the sun at different times his different radiation belts, unusual prolonged sun activity, and the fact that the sun is getting bigger.
man makes a minor impact.

remember we have had Several ice ages in the past, and each was followed by global warming. better to deal with warmth than to have to fight off polar bears every day in california.

Answer 2

The "greenhouse effect" is the phenomenon in which greenhouse gases block the long wave (heat) energy emitted by the Earth after the sun warms the planet. This has been known since the 1800s and the effect makes the planet comfortable for life as we know it. It increases the earth's temperature from about 0F (-18 C) to 59F (15 C). This is known. Orbital cycles are the main drivers of the radical changes that cause ice ages and solar cycles have an impact also. Solar Flare notes that historically, as the planet gets warmer (a result of orbital factors), CO2 concentrations increase. This is the correlation between CO2 and mean global temperature. It is a strong correlation but does not prove causality. However, we see there is a relationship. The historic rise in CO2 was due to the increase in the decay of biomass. As it cools down, the decay process slows. This is why people use refrigeration to preserve foods - it slow the decay rate. This is known. Currently, CO2 levels rise in the atmosphere from the burning of fossil fuels and the reduction in plants to convert CO2 to biomass. The increase in CO2 concentrations is from burning fossil fuels. Scientist can directly measure this. We know there is a relationship between temperature and CO2 concentrations, and that CO2 prevents some long wave radiation from escaping into space, warming the atmosphere. We can measure in the lab how much changing CO2 concentrations influences the air temperature, but this is tougher in the field because of all the interactions (with plants and oceans for example) there are. The basic theory is that as CO2 and other greenhouse gases increase, this will cause a warming of the atmosphere. The mean global temperature has risen on average about 0.7 C. It doesn't sound like much but averages "mask" extreme variation, and the time frame this has happened (150 years) is some of the fastest change we think has happened. Since 1998, we have had 8 of the warmest years on average since record keeping started. This is fact. We would not expect this from a random event (i.e. in a world which was not warming). The links below gives the basic information.

Answer 3

The green house effect keeps the earth warmer than it would be otherwise. Without the greenhouse effect the earth would be a frozen ball of ice. The current phase of global warming started about 10,500 years ago at the end of the last ice age. At that time the earth was somewhere around 15 degrees cooler than it is now. A layer of ice 1 mile thick set on top of what is now called Chicago.

There are lots of theories about why it happens but the simple fact is there are too many variables to know precisely what causes these climate changes. What is known is that the earth's climate has always been changing. That generally ice ages lasting on average 100,000 years have been followed by warmer periods lasting around 10,000 years. That's right we are about 500 years past due for an ice age.

We also know that 1000 years ago it was warmer than it is right now because Vikings were farming on Greenland. It is known as the middle ages warming period, and is ignored and unmentioned by the current crop of global warming alarmist. Who are the same people that 30 years ago were warning us of the coming ice age. See Newsweek April 28, 1975, Our cooling earth. So no I wouldn't be concerned.

Answer 4

While natural cycles of heating and cooling occur at more or less regular intervals, what we are now seeing in terms of global warming goes far beyond the historical naturally occuring deviations.

The reason for the cimate change is a large measurable increase in "greenhouse" gases. Those are gases that trap heat and do not allow the excess heat to escape out into space.

The reason for the increase in greenhouse gases, when one looks at the content of such gases, is that humans are pumping Co2 and other waste products into the atmosphere. The capacy of the atmosphere to absorb these pollutants is finite. What we are now witnessing is the build up of these gases and a resutling increase in global temperatures.

For an intersting example of the consequences of the greenhouse effect, take a look at the current climate and weather in the north of Spain.

Answer 5

Heavy smog caused by many hundred years of industrial revolution activities of wanting to make future generations' life better and easier, and due greed which have resulted in overdoing things way out of hand because the sky is not the limit. The point is, it isn't because of what we did to our environment or atmosphere. It's more of the consequences of what we did that causes our planet to behave in certain ways as saying we have a problem, and this the way I am showing my symptoms of a sickly planet. It's similar to what we did to our body when we were young and healthy and by the time we hit our middle ages, our body starts to develop signs of symptoms of any disease, if any, that we may have resulting from our early age activities. As being the people, we can only show concern, but it takes more than us to alleviate such global problems. It's not who or what anymore. It's all about getting leaders together in a global scale to start doing something about it. This could trun out to be a huge business, but many leaders had the head stuck in their butt hloes for so long, they don't want to deal with it. You can forget about actually getting leaders together, globally, because the leaders themselves are human too. I'm sure they think like we do, but the stupidity that seems to be in the way is that "I don't have time for this." You see what I mean. So it gets pushed aside until it's too late. Sure it's easy to just wait until someone comes along so you can play a blaming game. And now, being a leader, it's no longer my problem. Do you see that? It's good to show some concern, but at the same time I'm not going to loss my sleep over that. Our leaders sure won't either. Good enough, yes?

Answer 6

For one thing, because of all of our shaving cream spray cans,
hair-set spray cans etc that we'd rather use than environmentally
safe spays that are pumped out with a push of the finger tip.
Then, we're probably also suffering from the same effect that
caused Napoleon to run into trouble invading Russia and during
his retreat back to France.

Answer 7

Tim Ball says that Global Warming is a fallacy perpetrated by governments.

Answer 8

Due to increased industrial activity over the past 250 years. Could change climate and cause floods or droughts

Big polluters like the US and China turning a blind eye to the situation does not help solve the issue.

Answer 9

because were losers, we cut down trees which = no c02. we have retarded cars and we should move to everst. (we'll be safe there from drowning) hehe