Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades and its projected continuation into the future.
An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precepitation. These changes may increase the frequency and intensity of extreme weather events such as floods, droughts, heat waves, hurricanes and tornados. Other consequences include higher or lower agricultural yields, glacier retreat, reduces summer stream flows, species extinctions and increases in the ranges of disease vectors.
Warmings is expected to affect the number and magnitude of these events however it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100 warming is expected to continue past then, since CO2 has a long average atmospheric lifetime.
An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precepitation. These changes may increase the frequency and intensity of extreme weather events such as floods, droughts, heat waves, hurricanes and tornados. Other consequences include higher or lower agricultural yields, glacier retreat, reduces summer stream flows, species extinctions and increases in the ranges of disease vectors.
Warmings is expected to affect the number and magnitude of these events however it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100 warming is expected to continue past then, since CO2 has a long average atmospheric lifetime.
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