In the history of the Earth, climates have evolved depending on natural phenomena more or less cyclical. What do you think ?
Dear Bachir,
Climate varies on a wide range of space and time scales, and there are different causes for different processes and consequences. Your question is too broad to even start providing a meaningful comprehensive answer.
There is a huge scientific literature on this topic, so here is hint: The main reference and probably the best starting point to explore such questions is the Fifth Assessment Report (AR5) of the United Nations Intergovernmental Panel on Climate Change (IPCC). This multi-volume summary of the state of the art is openly available from
https://www.ipcc.ch/report/ar5/
I suggest you start studying this source and then sharpen your question.
Regards, Michel.
Dear Michel,
Thank you very much for your valuable comment and for the link. It is really appreciated.
With my best regards
Prof. Bachir ACHOUR
Dear Bachir, see this link:
http://www.physicalgeography.net/fundamentals/7y.html
Dear Bachir, The question about climate change is very interesting and it is what all of us should be seeking answers to. From my knowledge, climate change is not drastic but rather the gradual change over time in the whether conditions of an area. And climate change is now a global phenomenon due to the slow but sure degradation of the environment especially due to increased levels of green house gases like methane and carbondioxide but most especially the latter from our automobiles, burning fossil fuels and industries.
The consequences are dire. Because as the climate gets warmer, the glaciers on high mountains are melting and the sea levels are increasing. It is also said that climate change is related to food insecurity, and natural calamities such as hurricanes/strong winds, floods, storms and droughts. For a long time, I knew that these are just natural calamities but now it seems to me that these are calamities that we have been creating for a while and it is now a waiting time bomb. They say that the dry areas are bound to get drier and the wetter areas are bound to get wetter...the extremes of weather...floods and droughts everywhere. And it is not a guarantee that where it is hotter, and water evaporates more, that these are the areas where it will rain most because there are other factors like winds/monsoons that transport clouds from areas where the vapors condense to other areas.
I also know that there are people with a different school of thought and who think that the whole issue of climate change is being over-exagerrated
But I say that all of us in our various disciplines have to think of what we can do in our own small ways to make an impact and save mother nature
Dear Becky,
I would like to thank you for your interesting reply. It is really appréciated.
With my best regards
Prof. Bachir ACHOUR
Thank you Prof. Bachir. I am really interested in issues of climate change..although I am not a climatologist. I am a microbiologist but would like to find out how I can link microorganisms to climate change either as contributors..in which case, we can look for mitigation measures or as solutions to the current problems...All for the sole aim of saving the environment..sustainable environment. As it is said...the environment is not something we inherit from our predecessors but rather what we borrow from our successors
Dear Prof. Bachir Achour,
Thank you for the question. I think pollution has several origins: Chemical, physical, biological, cultural, etc.
The human activities of processing raw material to obtain usable raw materials is a pollution of high importance that affects the natural balance of the planet.
For example, metallurgy is aimed at the production of metals and alloys for various industries. Corrosion is a spontaneous natural phenomenon which attacks metals produced by metallurgical processes to restore it to its natural state. Example Iron is converted to Fe2O3, which is its stable natural state.
There are many other examples, such as the construction of dams, the movement of stones, rocks and sand from one region to another to build roads, and so on.
So it can be said that human activity is, by nature, polluting.
Best regards.
Dr. Adel OUESLATI
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