. The most obvious manifestation of climate change as global average temperatures will rise in the next 100 years 1,5-4,5oC. In the past century, average sea level worldwide has risen by about 15 cm; predicted by 2030, the sea level will rise by 18 cm as well. If the trend continued greenhouse gas emissions today, the rate of sea level rise by 2100 may be up to 65 cm compared to today. Sea levels could rise salination of freshwater supplies for productive activities and livelihood and threatened island states and low-lying areas.
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