Cutting down forests. This means there are fewer and fewer trees to suck carbon out of the atmosphere.
Cement and concrete production. Adds carbon dioxide.
Cattle and agricultural practices. Add methane.
Global warming refers to the warming of the earth since the Industrial Revolution and especially in the recent decades.
There is a natural greenhouse effect in our atmosphere which has kept the planet comfortable for millions of years. This is caused by the greenhouse gases trapping reflected heat and preventing it escaping into space. The water and carbon cycles support this effect.
Global warming is being caused by two things that humans have done during the past 200 years. We discovered coal, oil and other fossil fuels and began burning them in industry, transport and to generate electricity. This released billions of tons of carbon dioxide which was not part of the carbon cycle, but which instead had been safely sequestered underground for millions of years. This turned the greenhouse effect into an enhanced greenhouse effect, where the extra carbon dioxide is retaining more and more heat, causing global warming.
The other main cause is the deforestation of the world. We have cut down huge forests all over the planet. Trees absorb and store carbon. By destroying so much vegetation we made it impossible for the carbon cycle to function normally.
Some other views are:
*Global warming is a rise in average global temperature. It is part of natural heating and cooling global cycles which take place over thousands of years and cause rises and falls of sea level and encroachment and retreat of glaciers and the ice caps. These temperature variations are dominantly driven by energy from the sun with distance from the sun and the sun's current energy output being the main contributors, and the angle of the earth to the sun being next in importance.
This is the energy basis for the changes in seasons and average global variations in temperature. The timing and extent of these global cycles can be roughly predicted using Milankovich Cycles, which identify our planet's position, orientation, and movement relative to the sun. A great deal of interest and concern has been raised in recent years over the impact on global temperatures by man.
While these may be minor temperature perturbations relative to those caused by the sun, they may result in changes to living conditions which could greatly effect the human population.
Some gases that contribute to Global Warming and their man-made sources:
Carbon Dioxide from power plants, from cars, trucks, and airplanes. Also deforestation is responsible for up to 25% of all carbon emissions.
Methane from rice paddies and bogs, fossil fuel productions and bovine flatulence.
Nitrous oxide from nylon and nitric acid production, fertilizers in agriculture, vehicle catalytic converters, and the burning of organic matter. :) :)
A warming trend that is misinterpreted as being caused by humans.
The science fails to inform people that we are coming out of the LIA (Little Ice Age) which ended around 1700ad.
Trends of natural warming and cooling are not taken into consideration by alarmists. Despite some discrepancies between various data sets, the global temperature differences between 1942 and 1997 are small to none – except for land-based thermometer data outside the U.S. This disparity with the "Global Warming" (CO2 warming) premise demands an explanation – as do the much larger in trends of warming of the Northern Hemisphere compared to the Southern Hemisphere. Both satellite data and independent balloon data show a near-zero warming trend from 1979 to 1997 around the world. Balloon data and satellite data are the most reliable sources for temperature readings. We all know what happened in the El Nino year of 1998. A spike of 1 degree Celsius happened naturally from 1997 - 1998. A residual warming effect from 1998 to 2002 from the natural "Super El Nino" is a probability. There has been no measurable warming for over 10 years running and actually is showing a slight cooling trend. Overall warming by anthropogenic sources is very minor.
It's all hype!
Our planet has gone through many huge climate changes and the causes are not well understood. There have been several mass extinctions, several ice ages, many local floods, many volcanic eruptions, Careful temperature records have only been kept for a couple of centuries. The effect of industrial effluents is also not well known except in specific, identifiable cases like the Love Canal or the Japanese nuclear meltdown or the Chernobyl disaster.
The first and the foremost reason for global warming is the human polluted activities. Due to the rapid population growth, people are cutting down the forests. To fill their selfish purpose, they are destroying the nature. The other reason is that they are setting up the industries haphazardly. They are using the harmful chemicals like sulphurdioxide and all. Such harmful gases make the environment polluted and affect the green house gases which cause the Global warming.
Reasons of global warming- vehicles that releases CO2, industries, deforestation, refrigerators that release CFC.
We pump 900 tonnes of CO2 into the sky every second. This is a rate faster than the planet can remove it all. Therefore the CO2 concentration increases in our atmosphere. We have observed this happening since the 1950s.
Since CO2 is a greenhouse gas (we discovered this in the 1860s) it prevents heat escaping into space. Raising the concentration of CO2 in our atmosphere therefore traps additional heat that would otherwise have escaped into space. This additional heat is warming the atmosphere.
the reason of global warming is the increase of atmospheric carbon-dioxide.
Top climate scientists say there is no man-made Global Warming.
The Great Global Warming Swindle
Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Since the early 20th century, Earth's mean surface temperature has increased by about , with about two-thirds of the increase occurring since 1980. Warming of the climate system is unequivocal, and scientists are more than 90% certain that it is primarily caused by increasing concentrations of green.
1 Carbon dioxide emissions from fossil fuel burning power plants
2 Carbon dioxide emissions from burning gasoline for transportation
3 Global Warming Cause: Methane emissions from animals, agriculture such as rice paddies, and from Arctic seabeds
4 Deforestation, especially tropical forests for wood, pulp, and farmland
5 Increase in usage of chemical fertilizers on croplands
6 heat-trapping gases into the atmosphere.(CO2)
There are two parts to global warming, the natural and the manmade ones.
The natural warming is primarily caused by changes in the amount of heat from the Sun and variations in the way Earth moves in space. Most of these changes are cyclical, they happen on a regular basis; as such they are also predictable. These cycles vary in duration from a few years to hundreds of thousands of years.
It’s the manmade component that is giving rise to a great deal of concern. This comes about because our modern lifestyles produce a lot of greenhouse gas emissions and these have the ability to retain heat within our atmosphere. It’s the same mechanism that leads to natural warming, just that the cause is different.
The planet goes through it's own natural warming and cooling phases. The most recent ice age was the result of a global cooling, and then 19,000 years ago the earth began warming, temperatures started to rise, the ice melted and the temperatures have, overall, continued to rise ever since.
Using scientific techniques we can reconstruct an accurate picture of the climate over the last million years and a general picture stretching as far back as 542 million years. In the last couple of hundred years there are detailed weather records we can refer to.
What we have seen in recent decades is a significant increase in average global temperatures. Currently temperatures are rising by 0.0177°C a year, whilst this may not seem much it's many times faster than at any time in known history and is faster than many natural systems can cope with.
Why then is the world warming up? About 250 years ago we witnessed the birth of industrialisation and since then the world has become ever more industrial. Our modern lifestyles produce huge quantities of greenhouse gases and herein lies the problem.
Greenhouse gases have the ability to trap heat; the more of these gases there are in the atmosphere the more heat becomes trapped. We humans have produced so much greenhouse gas in recent decades that atmospheric concentrations has increased by over 40% causing more heat to be retained. In the last 100 years the average global temperature has increased by just less than 1°C.
The temperature rise to date has already had serious implications. Millions of people have fled their homes as their land has turned to desert or rising sea levels have flooded the land. In Siberia one million square kilometres of permafrost (permanently frozen ground) has melted and turned into mud and lakes. In mountainous regions glaciers have retreated further than they’ve ever been known to retreat before, half of these glaciers have melted completely. The number and intensity of storms has increased, diseases have spread into new regions, and significant amounts of the polar ice caps are melting and crumbling into the sea.
Where it gets much harder is predicting what will happen in the future - there's many factors to be taken into consideration and some of these aren’t particularly well understood. There’s been substantial research undertaken around the globe by a wide range of institutions and most reports predict global temperature rises of between 2°C and 4°C by the end of this century.
So what will the future effects of global warming be? The polar ice caps will continue to melt which will keep causing sea levels to rise. So far this hasn't had a dramatic impact but a rise of just a few feet will be enough to see many coastal areas inundated with water. Major cities such as London, New York and Miami are at or very close to sea level. In the next two or three hundred years many millions of people will need to be relocated as large areas of land are lost to the sea.
Some countries won't have the resources to protect their towns and cities and the inhabitants will be forced to relocate. Millions of square miles of agricultural land will be lost. Parts of Asia and Africa will be hardest hit.
There will be a shift in weather patterns, like we've seen in recent years but more so. For some this will bring benefits but for others it will bring hardships. Areas of barren wasteland will become fertile and could be used agriculturally but at the same time there will be desertification of fertile areas. New areas suitable for habitation will be formed but at the same time some areas will become uninhabitable. Some places will become wetter, others drier, some will become hotter, others colder. Extreme weather conditions including tornadoes, hurricanes, and floods will be more common - we've already witnessed an increased frequency of such events.
Some plants and animals will have to adapt, others will become extinct. At the same time others will flourish and this may be a good thing or a bad thing. For example, increased grain production would be beneficial but more swarms of locusts would be detrimental.
Global Warming is caused by many things. The causes are split up into two groups, man-made or anthropogenic causes, and natural causes.
Natural Causes:
Natural causes are causes created by nature. One natural cause is a release of methane gas from arctic tundra and wetlands. Methane is a greenhouse gas. A greenhouse gas is a gas that traps heat in the earth's atmosphere. Another natural cause is that the earth goes through a cycle of climate change. This climate change usually lasts about 40,000 years.
Man-made Causes
Man-made causes probably do the most damage. There are many man-made causes. Pollution is one of the biggest man-made problems. Pollution comes in many shapes and sizes. Burning fossil fuels is one thing that causes pollution. Fossil fuels are fuels made of organic matter such as coal, or oil. When fossil fuels are burned they give off a green house gas called CO2. Also mining coal and oil allows methane to escape. How does it escape? Methane is naturally in the ground. When coal or oil is mined you have to dig up the earth a little. When you dig up the fossil fuels you dig up the methane as well.
well i think the main reason is CO2 or carbon dioxide gas which reduces outgoing long wave lengths. It easily absorbs the short length radiations and aloows only liitle of long wave length of radiation. So the earth absorbs part of the outgoing radiation also. therefore it heats up that means global warming.
so sources are many:
-machines which release CO2 gas
burning of garbage
mostly using of fossil fuels
i hope this answer was useful 2 u.
There are hunderds of reasons for gobal warming i.e..
1.Carbon dioxide emissions from fossil fuel burning power plants
2.Methane emissions
3.Deforestation
4.Chemical fertilizers on croplands
It causes rise in sea levels, widespread extinction of species, massive crop failures etc..
To collect taxes and make the taxed feel good about it.
0.development of science-technolongy and increase humen total require ment.
1.dishonesty and greed of selfish people.
2. illiterate
Pollutions by vehicles,factories ,people and cutting trees uncontrollably.
cars , factories , destroying forrest and trees and ...
