@M Ramachandra, yes, it is threatening both our lifes and ecosystem. Another issue which deserve to be under this thread is OXFAM research on HUNGER, regarding climate change!
http://www.bloomberg.com/news/2013-09-22/hunger-seen-worsening-by-oxfam-as-climate-change-heats-up-world.html
Human settlements along coastlines might be affected, and the drought can cause shortage of fresh drinking water and food. For example, Southern California is already short of water.
Everything that happens on the world (in our house) is the result of human activity.
@M Ramachandra, yes, it is threatening both our lifes and ecosystem. Another issue which deserve to be under this thread is OXFAM research on HUNGER, regarding climate change!
http://www.bloomberg.com/news/2013-09-22/hunger-seen-worsening-by-oxfam-as-climate-change-heats-up-world.html
Climate change has been and remains a trait of the Quaternary. Humans have only accelerated the rate of change. The problem, of course, is that the world's climate is now changing much faster than humans can adapt to. This means, paraphrasing the ecosociologist Ramon Folch, that climate change is a minor ecological issue, a relevant environmental problem, and a paramount threat to human society.
I also endorse the views
Certainly man made the ecosystem equilibrium in to trouble
Absolutely true! We are the diggers of our own grave. Man has disturbed the environment in such a way that the whole balance of nature seems to have shaken.
I have a problem with the largely unstated assumption that climate change means man-made climate change. We know from historical data that climate does change, with or without the human race. (The so-called hockey stick graph introduced in the 3rd IPCC report was obtained by a selective process of data cherry-picking that came close to scientific fraud.) We also know from various paleological records that climate can sometimes change quite rapidly. My question is, how can we separate out natural climate change from man-made climate change?
The only method that does not involve circular arguments, as far as I am aware, is to model the climate to determine what it would be like if there were no human presence, and then compare the results of that model with the actual climate. However, this assumes that we have climate modelling software, such as global circulation models (GCMs) that can accurately predict past and present climates. And as you may have noticed, the present generation of GCMs falls woefully short in this. Consequently, I would suggest that no-one really knows whether or not human activity is having a significant effect on global climate.
I do not suggest by this that mankind does not have any effect on climate. Certainly, some activities such as deforestation can have a measurable local effect. I simply have seen no convincing evidence that the climate changes we have seen in the past twenty or thirty years are due to human activities rather than natural effects.
@ Roger Graves:
I unstand your problem.
There is climate change and there is the man-made alteration of this change.
What i don´t understand is to relate deforestation only to local effects.
Human beings contributed the majority to the loss of a great part of
"wild nature" since the emergence and spread of agriculture. Official estimation
are that "we" cleared around 50 % of all natural habitats with a
current annual loss of 0.5-1.5% (UNEP 2002 Global Environmental Outlook
3). Actual studies estimate a global total loss of 35 - 50 % of the originally closed (canopy) tropical forest [UNEP, 2005].
As vegetation was altered in a large scale the effects should also be visible on a larger scale than just locally...
Man made changes and his activity are destroying our mother earth through the climate change which we are witnessing Changes resulting rising sea levels and melting of the polar ice caps, and increase in occurrence and severity of storms and other severe weather events.
http://www.livescience.com/topics/global-warming/
http://ec.europa.eu/environment/life/publications/lifepublications/lifefocus/documents/climate_change_mitigation.pdf
http://www.who.int/globalchange/publications/climchange.pdf
https://www.oxfam.org/sites/www.oxfam.org/files/mb-climate-crisis-east-africa-drought-270417-en.pdf
https://www.environment.gov.za/sites/default/files/legislations/national_climatechange_response_whitepaper.pdf
http://www.planificacion.gob.bo/uploads/2.STATEMENT%20WORLD%20PEOPLE%20TIQUIPAYA.pdf
http://www.fao.org/forestry/15538-079b31d45081fe9c3dbc6ff34de4807e4.pdf
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