The answer to this works in a synergistic way. With rising sea levels, drinking water is projected to become polluted in coastal cities like Shanghai, Manila, Jakarta, Bankok, Kolkata, Mumbai, Karachi, Lagos, Buenos Aires and Lima. The International Association of Hydrology says this could result in a problem big enough to abandon these cities. The rising sea levels also harm agricultural lands though, through flooding. Bangladesh and Ethiopia are projected to be some of the hardest hit (along with Pacific Island countries and islands of the coast of Africa), with some of the effects already being evident. In 1998 65% of Bangladesh’s territory was temporarily drowned and its agricultural lands were completely ruined. Climate change is projected to have a 21% decrease in the ag. lands there. In Ethiopia, water has taken the oppositive transformation, and drought has caused 8 – 10 million people to be at risk for starvation in 2005.
A rise in CO2 levels is also shown to cause plants to stop producing water in their leaves, which means there is less rain to be made. This also diminishes the fruitfullness of the crop itself.
So, all over, crop failures and less than optimal crops will be the case, but water problems will cause a massive amounts of death in particular countries.
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