Food Production. Our food is based on plant production. We eat plants directly (bread form wheat, rice, potatoes, vegetables, fruits, etc.) or indirectly (by eating meat that comes form animals that have eaten corn, soybean or simple pasture). All plants are affected by the temperature and precipitation of the places where they are grown. For example, in Asia rice is the main food for the population. If southern Asia becomes too hot for rice cultivation, many people will be at risk of suffering mal-nutrition and the health impact will be important.
Water Resources. Rainfall directly affects the water in rivers and lakes and temperature affects how the water evaporates and how it is used. Water availability is key to both humans and ecosystems and many regions of the globe suffer severe shortages in water in the present. The health issues related to potential reduction in water quantity and quality are great.
Economy. Almost all sectors of the economy are affected directly or indirectly by climate. This can be illustrated with some examples. Skiers may not be able to go to certain places in the Alps since the snow conditions will certainly change. The energy requirements for air conditioning will increase with great implications for the energy sector. The insurance companies may not want to insure buildings that are in areas that become vulnerable to floods.