how is global warming the largest threat to humanity????
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Global warming is the rise of the average temperature of the Earth’s climate system. It is extremely likely that human influence has been the dominant cause of the observed warming since the mid of last century. The largest human influence has been emission of greenhouse gases such as carbon dioxide, methane and nitrous oxide. Climate model projections indicate that during the 21st century the global surface temperatures is likely to rise a further 1,7 ºC for their lowest emissions scenario and up to 4,8ºC for the highest emissions scenario. The scientific community anticipates dramatic consequences, with impacts differing from region to region but to include:
More frequent and severe weather (, storms, heat waves, wild fires, droughts, heavy rainfall, floods, heavy snowfall)
Higher death rates (especially children, the eldery and low income communities)
Dirtier air
Rising of sea level
Changing precipitation
Expansion of deserts in the subtropics
Retreat of glaciers, permafrost and sea ice
Ocean acidification
Higher wildlife extinction rates
Sixteen of the 17 warmest years on record have occurred since 2000. The probability that these changes could have occurred by chance is virtually zero. The rate of temperature rise in the ocean is accelerating at unprecedented levels and Humanity has been the problem. The thermal inertia of the oceans mean that climate can take centuries or even thousands of years to adjust to changes. There is no doubt- climate change promise a frightening future, and after a century worth of pollution into the air it is too late to turn back the clock. The good news is that by aggressively reducing our global emissions we can still avoid a lot of the severe consequences that climate change would otherwise bring.
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Global warming is the rise of the average temperature of the Earth’s climate system. It is extremely likely that human influence has been the dominant cause of the observed warming since the mid of last century. The largest human influence has been emission of greenhouse gases such as carbon dioxide, methane and nitrous oxide. Climate model projections indicate that during the 21st century the global surface temperatures is likely to rise a further 1,7 ºC for their lowest emissions scenario and up to 4,8ºC for the highest emissions scenario. The scientific community anticipates dramatic consequences, with impacts differing from region to region but to include:
More frequent and severe weather (, storms, heat waves, wild fires, droughts, heavy rainfall, floods, heavy snowfall)
Higher death rates (especially children, the eldery and low income communities)
Dirtier air
Rising of sea level
Changing precipitation
Expansion of deserts in the subtropics
Retreat of glaciers, permafrost and sea ice
Ocean acidification
Higher wildlife extinction rates
Sixteen of the 17 warmest years on record have occurred since 2000. The probability that these changes could have occurred by chance is virtually zero. The rate of temperature rise in the ocean is accelerating at unprecedented levels and Humanity has been the problem. The thermal inertia of the oceans mean that climate can take centuries or even thousands of years to adjust to changes. There is no doubt- climate change promise a frightening future, and after a century worth of pollution into the air it is too late to turn back the clock. The good news is that by aggressively reducing our global emissions we can still avoid a lot of the severe consequences that climate change would otherwise bring.
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These changes have led to the emergence of large-scale environmental hazards to human health, such as extreme weather, ozone depletion, increased danger of wildfires, loss of biodiversity, stresses to food-producing systems and the global spread of infectious diseases.
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