I think global issue affects us the most is global warming because global warming is becoming very important problems presently that it is affected whether the human health , animals health , ecology or even global economy. By sample global warming in thailand that will say is in 2010, the North and Southeast regions of Thailand experienced the colder weather than usual, while the Central region faced the heavy flood that they had never faced before. The South of Thailand also faced the stronger storms.
Not just Thailand That has the problem global warming also has other countries that has the problem global warming alike. Whether it is at the North Pole that has the problem global warming is polar ice melts from the action of man that making the world is higher temperature. Causing the sea levels increased. Or The most dangerous may flooding world.
while us can protect our world in many ways.
By the way all of us can do:
1. Reduce, Reuse, Recycle.
2. Use Less Heat and Air Conditioning.
3. Buy Energy-Efficient Products.
4. Use the "Off" Switch.
5. Plant a Tree.