Social effects
1. Agriculture
With global warming heating the Earth, it will raise atmospheric and ground level temperatures. Such high temperatures so close to the ground means that the heat will ravage soil and vegetation, rendering thousands of crops and plantations useless. Higher temperatures also means more amounts of evapotranspiration (evaporation and transpiration) which reduces the amount of water on ground level. This unfortunately followed by a decrease in rainfall, limiting the water supply the crops need in order to survive.
2. Aquaculture
The oceans in the world absorb 30% of all man-made carbon dioxide emissions from the atmosphere, and with the increase of carbon dioxide, sea life will suffer more than ever before. One of the organisms effected by this is phytoplankton. Phytoplankton are the beginning of the food chain for all sea life, and a reduction in their numbers creates a chain-reaction through the entire food chain causing fish numbers to decrease. Also, the melting glaciers mentioned earlier will desalinate (reduce the salt levels of) the oceans because the glaciers are freshwater. This will make it very hard for saltwater fish to live.
3. Diminished food and water supplies
With great loss of both crops, fish, and ground level water, developing countries will be in desperate need of supplies, as the majority of their resources are from within their own country. Inland country's crops will be diminished, and coastal country's fish intake will be greatly reduced, leaving people in poorer areas without food. Imported food and water will also be hard, as countries that still have the vital resources may not be willing to part with them.
4. Migration and Conflict
With limited food, water, and perhaps unbearable heat, countries that have been recently populated might become deserted. With lack of such vital resources comes great emigration from poorer areas, such as central Africa and Southwest Asia. Once permanent citizens will become nomads wandering land in search for food and water, hoping to come across another country that has what they want. But these countries, not wanting to share their precious resources will fight to drive them off, and the other side will fight back.
5. Economy
An increase of natural disasters, lack of resources, and friction between nations will also increase government expenditure. Destruction caused by cyclones, flooding, volcanic activity will cost billions of dollars in damage to both land and infrastructure alike which the government will have to pay for. They will also have to pay for food and water to give to the poorer areas to keep people from starving, and not to mention the various military needs in order to survive a conflict. The whole world economy will go out of balance.