Question

how is global warming the largest threat to humanity ​

Answer 1

Explanation:

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

Answer 2

Answer:

While health has always been effected by climate and weather, it is the change in climate and climate variability, particularly changes in weather extremes, that is a significant threat to human health. Again, absent dramatic and near term changes in political will, temperatures are expected to increase by 4°C by the end of this century. What do increasing temperatures mean for human health? (Readers should note that unless otherwise indicated statistics cited below come from the Obama Administration’s 2016 report.)