what is two examples of what can cause global warming?

Answer 1

There's the above two, here's some other sources of greenhouse gases that contribute to the greenhouse effect and global warming...

Deforestation, fertilisers, cloroflourocarbons (CFC's) such as in air conditioning units and fridges, open fires, numerous industrial and chemical processes including quarrying, mining and cement production, fire suppressants, effluent, landfill sites, livestock, rice cultivation, volcanic activity, the seas and oceans, natural decay of plants and animals, solar variation (changes in the sun) and Milankovitch Cycles (changes in the earth).

EDIT:
To Jarrah: Both CFC's and HFC's fall under the IPCC classification of Greenhouse Gases. HFC's are relevant to radiative forcing, the most prevalant of which is triflouromethane at concentrations of 14ppt. CFC's and HCFC's are relevant to both radiative forcing and ozone depletion. You're absolutely right to say that they've been banned but they still exist in old appliances and many have very long atmospheric lifetimes so the emissions from decades ago are still contributing to the greenhouse effect. For example, dichlorodifluoromethane (CFC-12) has a 102 year atmospheric life and a GWP of 6800, most have longer atmospheric lifes and some have greater GWP's.

Solar variation and Milankovitch Cycles have very small effects over short periods of time but over long periods they have a profound cumulative effect. Historically they were two of the main contributing factors to the natural global warming and cooling cycles.

Rice production produces methane. The wet conditions in which rice is cultivated provides ideal conditions for methanogenesis, there is some methantrophic oxidisation in the overlying water but the majority of the methane is released into the atmopshere. In countries where rice cultivation is prevelant it's the primary source of anthropogenic methane.

Answer 2

Sorry Trevor...there are a couple of your examples that are wrong.

CFCs are not a contributor to climate change in as much as they are not a greenhouse gas. They have been outlawed across the planet and were a reason for the Ozone hole. No one uses them in the production of any goods now. Same with Fire suppressants - HFCs were even worse than CFCs.

Sunspot activity is a miniscule proportion of the problem. So are the Milankovitch cycles.

I'm completely baffled as to how rice production could be a contributing factor as well!

The main things are burning coal, beef and dairy cattle and vehicle emissions.

Love and Light,

Jarrah

Answer 3

element is, although there are organic reasons of world warming, they do no longer look to be inflicting the international warming we are seeing. the main organic rationalization for worldwide warming is differences in image voltaic enter--the two because of the fact the solar is hotter, or because of the fact the attitude the Earth is at is melting ice, subsequently reducing albedo, subsequently increasing the quantity of image voltaic skill it incredibly is stepping into the ambience. There can be effects with regards to organic atmospheric particulates from volcanoes. Volcanic eruptions tend to have a cooling result, so an prolonged-sufficient era without volcanic eruptions could tend to have a warming result.

Answer 4

Global warming is a very complex collection of many effects

this text only covers some aspects of global warming mainly man made desertification

industrial contamination ,the contaminating effects of the cities ,is another story

there are natural cycles in the planets life
but a lot is influenced by mans existance ,and this is increasing with overpopulation,putting strains on Natural resources and increasing contaminations as well as destructions of essential componants the ensure living conditions for all life forms

in North Africa,India,Mexico ,millions of people are effected by land loss and desertification and some have died as a result

in china, thousands of what used to be farmers are running for their lives from the dust storms that have burried their towns and turned their lands into dessert,

,the Sahara is growing by 7 kilometers a year
and all of the desserts we know are a results of mans actions ,and they are increasing ,not getting less ,in the dinosaurs days ,there were very few desserts.

collectively this planet is drying up because of bad farming practices like,over grazing and fertilizers,

each degree rise in temperature means 10%crop loss

and there is less and less water (because of deforestation),to irrigate this production ,
and there are less and less farmers to do it..
and there are 70 million more peole every year that have to eat and drink and wash

who are overpumping deep carbon aquifiers
who are plowing more and more unstable lands because they have lost so many million hectares to desertification ,
because of bad farming practises ,such as using fertilizers and heavy machinary or over grazing

RISING SEAS
The northpole is melting ,and we will know it without ice in our life times.
this does not affect the sea level because it is ice that is already in the water.but the melting ice from Green land and the south pole ,are another matter.



http://www.greenpeace.org/international/...

http://news.bbc.co.uk/2/hi/science/natur...



if forrest are being exchanged for ashalt,concrete and desserts
what is gonna keep this planet habitable for us

Global warming is in theory reversable,but it will mean global co operation between all countries ,and taking into account human nature and the world politics ,it is unlikely that this will happen,

At least not untill we are all in the middle of planetary disastres and it becomes a battle for the survival of humanity every where.

SOLUTIONS
if you want to help the planet ,plant a tree every week ,if everyone on the planet did we we would be able to reverse the destructive processes

reduce carbon emisions,and they are already working on that by alternative forms of energy and regulations on carbon producing materials,aerosol cans,burning rubbish,industrial chimneys,powerplants etc.

the capture of carbon and the production of water and assist the aquiferous manta.

the world bank pays large subsidies for reforrestation to capture carbon and the best tree for this is the Pawlonia

Waterharvesting projects ,such as millions of small dams.to redirect over ground waterflows from the rains into the ground to supply subteranian water supplies.

the protection of existing forrests.

stop building more highways,urban planning to include vegetation stop building cities encourage people to return to the land to conduct their business from there which now has become possible thanks to the internet.

education to motivate people to auto sufficiency by building more home food gardens.

education on environmental awareness
education on family planning to curb over´populaion

Agricultural education and improvements to follow the principals or sustainability and soil management.

and improve economis situations for people who live in areas where deforestation has become their only alternative for survival ,which is a short term solution that has long term negative effects

try to replace farming with eco tourism,

more environmental or land ,design to prevent bush fires,such as--fire breaks

,more dams.regulations and control for public behaviour

alternative effeciant public transport to discourage the use of the internal conbustion engine

recicling wastes,limit water use

here are a 100 more ways


http://www.eco-gaia.net/forum-pt/index.p...

Answer 5

1)Politicians spewing out hot air in search of votes.

2)Hollywood celebrities spewing out hot air just to hear themselves yap.

Answer 6

CO2 from cars and CO2 methane from cow poop;.