I agree with Kenneth that it is the weather that keeps on changing as a result of variety of factors. In Kenya wind waves, currents and tides are common weather  occurrences patterns  which have been experienced since ever and in 2004(Tsunami hitting the coastal city of Mombasa) nobody could understand what might have led to it. Its effects originated from South Africa part of the Indian Ocean. The effects were devastating with several people losing their lives and properties.

From the vast evidence compiled consistently and comprehensively in the successive reports of the Intergovernmental Panel on Climate Change (IPCC), the climate of the Earth is changing due to the anthropogenic increase in greenhouse gases and hence average global/regional surface temperatures. I can say that the change in climate has an effect on the economy and hence humanity, via the damages it unleashes. In order to compare the regional damages, I presume one has to quantify the extent of the impacts, say, as a loss to the gross domestic product. However, there is a lot of uncertainty and controversy surrounding the measuring of climate impacts! Try and look out for some integrated assessment studies on this issue. Good luck!

Hi Keroboto, Thanks for your response. I have read IPCC reports both in soft and hard copies. Consistent in the reports it is clear of anthropogenic causes. what however i need clarity is what Kenneth M Towe has clearly outlined in response to to you!

Evans,

You ask about climate change and climate variability and then Kenneth brings the issue of weather changes. However, according to you: "This question aims at comparing impact of climate change on household in different continents. What is the most most recent finding?"  So is the aim to compare impacts of climate change, or climate variability, or weather changes, on households in different continents?

Yes, climate has been changing since time immemorial, so what has been the cause(s)? Is the cause(s) the same today as they were then?

As I said before the answer is before us but we choose to look the other way earwise and eyewise. Well, good luck and goodbye.

The most compelling evidence is the melting of the Arctic sea ice, but you won't accept that. Moreover, climate is average weather so any changes in climate will be expressed firs in weather extremes. Note it is the weather extremes which cause the damage. A 1C rise in global temperature is not the problem, it is the way it makes heat waves worse, and floods and droughts more likely.

Just ask the residents of flat-lying Pacific Ocean islands, those that are still above water and those that were not forced to move away so far: Their story is not very happy. A continuous rise in sea level (due to melting of ice), the continuous worsening of storms (due to extra power in the air-from latent heat of condensation), etc - do you need more proof?

In the meantime, those that (they think) are not much affected yet can argue that climate changed before, so stop worrying, only those in the Pacific atolls will drown under water, those in India will die from extreme heat, those hit by hurricanes will be eliminated, those hit by multi-tornadoes will be blown to pieces, those in drought will dry out by dehydration, those affected by the unprecedented rise in humidity (asthma epidemic in Canada for second year in a row) etc, etc  BUT you will be OK.....

Is this how scientists will help humanity, because they know a little bit more than the average person? Real Shame!

I know well about the fate of the Kiribati islanders who has relocated their homes many times away from the rising seas. They have lost their limited crop land. They have imported garbage from the USA (including old school buses) to build sea-walls that have proven to be no match for the rising seas; they are going under water, too!

I understand there is no consensus on how much the sea has risen recently.