Question

1414
Article - Global warming
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Answer 1

Answer:

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Explanation:

Climate change is happening, it is largely caused by human activities, and it presents a serious threat to nature and people now, and in the future. Without ambitious mitigation efforts, global temperature rise this century could exceed 4 degrees Celsius above pre-industrial levels, with catastrophic impacts.

Climate change and global warming have profound implications for BirdLife International’s conservation priorities and approaches. It affects the populations and distributions of species, the composition of ecological communities, and nature’s provision of goods and services – such as food, fuel and clean water. Climate change also compounds other major threats to biodiversity, such as invasive alien species, habitat fragmentation and overexploitation.

Answer 2

Answer:

The rising average temperature of Earth's climate system, called global warming, is driving changes in rainfall patterns, extreme weather, arrival of seasons, and more. Collectively, global warming and its effects are known as climate change. While there have been prehistoric periods of global warming, observed changes since the mid-20th century have been unprecedented in rate and scale.[1]



Observed temperature from NASA[2] vs the 1850–1900 average as a pre-industrial baseline. The primary driver for increased global temperatures in the industrial era is human activity, with natural forces adding variability.[3]

The Intergovernmental Panel on Climate Change (IPCC) concluded that "human influence on climate has been the dominant cause of observed warming since the mid-20th century". These findings have been recognized by the national science academies of major nations and are not disputed by any scientific body of national or international standing.[4] The largest human influence has been the emission of greenhouse gases, with over 90% of the impact from carbon dioxide and methane.[5] Fossil fuel burning is the principal source of these gases, with agricultural emissions and deforestation also playing significant roles. Temperature rise is enhanced by self-reinforcing climate feedbacks, such as loss of snow cover, increased water vapour, and melting permafrost.