Climate is used to express the condition
of the atmosphere of a place. The word is quite close to the season. Climate is used for large plots only for a large period while weather is used
for small space for relatively small period.
Climate change is a term used to refer
to changes in the Earth’s climates, at local, regional, or global scales.
This can also refer to the effects of
these changes. In other words, "Climate change is defined as a significant variation of average
weather conditions—like, conditions becoming warmer, wetter, or drier—over
several decades or more."It is a long-term trend that separates climate
change from natural weather variability. Our knowledge and understanding about
climate change and its causes and effects on the world is developing more than
ever before. It is now clear within the scientific community that climate
change is real. Changes are happening at this rate which is many more than
before and human-caused carbon emissions into the atmosphere are contributing
to this accelerated rate of global climate change.
We ourselves are the biggest reason why
climate change is happening so fast. The rapid climate change now is caused by
humans using oil, gas, wood and coal for their homes, factories and transport. When
these fossil fuels burn, the greenhouse gas releases mostly carbon dioxide(CO2).These gases trap the Sun's heat and
raises the temperature of the earth. Reducing emissions of greenhouse gases
through better transport, food and energy-use choices results in improved
health, particularly through reduced air pollution. In fact, the average temperature of the
planet has increased by 0.8º Celsius (33.4° Fahrenheit) compared to the end of
the 19th century.
The second major source of climate
change is deforestation which releases carbon dioxide in atmosphere. It is
estimated that harvesting, fires and forest conservation release an average of
8.1 billion metric tons of carbon dioxide per year, accounting for more than 20
percent of all global CO2 emissions.
Other human activities that generate air
pollution include fertilizer use (a primary source of nitrous oxide emissions),
livestock production (a major methane emitters), and certain industrial
processes that release fluorinated gases. Earth's climate change is also
happening due to activities like agriculture and road construction.
Scientists say that if we want to avoid
climate change, then the rise of temperature will not have to be reduced.
They say that global warming needs to be
maintained at 1.5 F by 2100.If we do not control it now, then by the end of
this century the earth may be hotter than 2C.Scientists believe that if nothing
is done now, global warming could exceed 4K, which can lead to disastrous heat waves.
Millions losing their homes to rising sea levels and irreversible loss of plant
and animal species.
People in vulnerable areas will be the
least able to cope without support for preparedness and response in most
developing countries. WHO supports countries in building health systems and
protect health and helps in tracking national progress from climate change.
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