Green house effect
The second great problem is the green house effect, which is caused a lot of CO2 (carbon dioxide) in the air above all.
In spite of the fact that the increasing of temperature is very slow it can cause the thawing of polar glacier (roztání ledovců) may be in the period of 50 years.
Scientists must solve the problems e.g. rising the sea level and it can float (zatopit vodou) some coast where live people.
The glaciers are the biggest sources of drinkable water.
The rising temperature has a negative influence (vliv) for vegetation on the Earth.