what will happen if global warming still exist?

Answer 1

I think it is unlikely that global warming seriously threatens the survival of humanity. Even in the almost-worst cases, things will not change so rapidly that people cannot adapt to them.

I think the more important danger is that the species and natural environments will be forced to accept changes on a timescale much faster than that given by normal geologically-driven changes. In a mere 50 to 100 years, there will be temperature and weather changes that would normally take place over thousands of years. Did you realize that it takes about 1 Million years for a new species to develop? For many species, the challenge to change to a different environment will not be met: they will leave no descendants.

The result for us is that the world will be impoverished:
- fewer species of plants and animals to experience
- fewer species of herbs that can serve as a starting point of potential drugs and medicines
- less natural beauty
- in general, a less enjoyable world
We are already seeing severe extinction rates of many species of animals: Not all of it can be blame directly on global warming, a lot of it has to do with other human influences and activities. Examples: the coral reefs may die out; and it is expected that all or nearly all species of amphibians (frogs & salamanders) will disappear entirely in a few decades.

It is also likely that agriculture will get tougher, not easier: overall, the reduced availability of water is likely to be more important than the increase in temperature with regards to agriculture. I don't think that increase in C-O2 will encourage plant growth significantly, given the other constraints.

Answer 2

In actuality, global warming is essential in providing warmth to the life on Earth. However, as the concentration of carbon dioxide continue to skyrocket, the temperature increases significantly across the globe, since the Industrial Revolution.

If the temperature continue to rise, the ecosystem will be greatly devastated and you can guess what will happen next.

Answer 3

Global warming DOES exist.
The trend is well documented.
There is some small argument as to the cause,
(mostly by those supported by fossil fuel lobbyists
- remember the tobacco "science"?).
Effects:
The weather will become more 'active`
Weather patterns will change
Sea levels will rise

The only question is how much and how long the effects will continue.

Answer 4

There will be coastal flooding and great damage to agriculture.

Rich countries can cope, but the expense of coping will hurt their economies badly. In poor countries already struggling to feed themselves, many will die of starvation. More here:

http://www.reuters.com/article/scienceNews/idUSL052735320070407
http://www.ipcc.ch/SPM6avr07.pdf

Answer 5

The blip in the history of the earth that is the age of man will be imperceptibly shortened.