(2015·长沙四校联考)We cannot say for sure what kind of home Earth will offer in 2080，but experimental models help paint a picture of what a 2℃ warmer world would look like.
One key difference will be the increase in extreme weather events.The good news is that with investment，we can adapt to some of these.In 1991，a massive cyclone(龙卷风)struck Bangladesh，killing 130,000 people.Afterwards，the country built shelters and early warning systems.When the equally powerful cyclone Sidr struck in 2007，the deaths were reduced to less than one－tenth of that.“Better preparation can bring down the death rates，”says Huq，an expert from the International Institute for Environment and Development.
But if the temperature rises by above 2℃，impacts will be increasingly felt worldwide.The wealth of Europe and North America means they can build better defenses and suffer far fewer deaths，but economic costs will be huge.
A warmer climate will be bad news for global agriculture.Agronomists are busy designing new varieties of main crops like rice and wheat which are able to survive more frequent heat－waves and droughts.Organizations like the Consultative Group on International Agricultural Research helping farmers find out what works for them.Despite such efforts，crops will fail more often，probably leading to high food prices.
Cases of health problems ranging from heatstroke to infectious diseases will also increase.Models show tropical diseases will move into higher latitude(纬度)and altitude with warming，though some believe that affected regions with better public health systems will avoid the worst effects.
The degree of sea－level rise is a big uncertainty，but we know it lags_behind temperature increases so the worst of those consequences probably will not have kicked in even by 2080.Scientists are also split on the link between temperature and human conflict.Some believe civil unrest will rise as the climate becomes harsher.