Question

Change in climate may be due to natural internal processes or external factors, due to

persistent changes in the composition of the atmosphere, or in land use brought by humans.

Short-term fluctuations like El Nino, represent variation in climate for short temporary

periods. On a longer time scale, changes in ocean heat circulation patterns may result in a

stronger impact on climate. Variations in Earth’s orbit lead to differences in the distribution

of sunlight reaching the Earth in different seasons and at different places on Earth. The solar

intensity is also known to affect global climate.

Anthropogenic factors relate to human activities which include burning of fossil fuels, ozone

depleting causes, and deforestation. These could lead to impact on freshwater availability,

oceanic acidification, food production, flooding of coastal areas and increased number of

water borne diseases associated with extreme weather events.

Glaciers are one of the most sensitive indicators of climate change. Their size is determined

by the input of snow and their melting output. Due to rising global temperatures, their size

shrinks, leading to escalation of sea levels. The ice on Arctic ocean is also melting rapidly,

which is another proof of climate change.

Due to climate change, the distribution and density of vegetation may also be affected. The

increase in temperature will lead to early onset of flowering and fruiting, which will affect

the life cycles of animals dependent on them. One example is the destruction of rain forests

of Europe and America, 300 million years ago. These forests fragmented into isolated

‘islands’, leading to the extinction of many plant and animal species. note making​

Answer 1

Answer:

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Explanation:

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