Global warming refers to the significant rise in Earth's average temperature due to increased carbon dioxide levels, primarily from human activities like fossil fuel combustion and deforestation. Its impacts include environmental changes such as glacier retreat, extreme weather, and agricultural shifts, with a scientific consensus attributing these changes to human activity. Urgent action is recommended to reduce greenhouse gas emissions and mitigate further damage to the planet's ecosystems and human health.

2. Global warming is the observed century-scale rise in the average temperature
of Earth’s Climate system.
Since 1971, 90% of the increased energy has been stored in the oceans, mostly in
the 0 to 700m region. Despite the oceans' dominant role in energy storage, the
term "global warming" is also used to refer to increases in average temperature of
theair and sea at Earth's surface . Since the early 20th century, the global air
and sea surface temperature has increased about 0.8 °C (1.4 °F), with about two-thirds
of the increase occurring since 1980.

3. Global warming is primarily a problem of too much carbon
dioxide (CO2) in the atmosphere—which acts as a blanket,
trapping heat and warming the planet. As we burn fossil fuels like coal, oil and
natural gas for energy or cut down and burn forests to create pastures and
plantations ,carbon accumulates and overloads our atmosphere. Certain waste
management and agricultural practices aggravate the problem by releasing other
potent global warming gases, such as methane and nitrous oxide

4. The Effects of Global Warming are the environmental and social changes
caused (directly or indirectly) by human emissions of greenhouse gases. There is
a scientific consensus that climate change is occurring, and that human activities
are the primary driver. Many impacts of climate change have already been
observed, including glacier retreat, changes in the timing of seasonal events (e.g.,
earlier flowering of plants), and changes in agricultural productivity.

5. The greenhouse effect is a process by which thermal
radiation from a planetary surface is absorbed by atmospheric greenhouse gases,
and is re-radiated in all directions.
Since part of this re-radiation is back towards the surface and the lower
atmosphere, it results in an elevation of the average surface temperature above
what it would be in the absence of the gases.

6. Some basic predictions of global warming on temperature and sea level:
Global mean temperature should increase by between 1.4 and 5.8೦C (2.5 to 10೦F).
The Northern Hemisphere cover should decrease further, but the Antarctic ice sheet should
increase.
The sea level should rise by between 9 and 88 cm (3.5" to 35").
Other changes should occur, including an increase in some extreme weather events.
The United States is ranked nr.1 among large nations of being a global warming polluter
The sooner we take heed of these statistics and implement changes that address global
warming, the quicker we can reverse the disturbing trends and the less damage will occur to our
planet and way of life.

7. Useless usage of AC's and Refrigerators should be stopped
because from them harmful rays cfc's are emitted which results in
depletion of ozone layer and from that hole UV rays of Sun comes to
the earth and cause many diseases to both animals and plants i.e.
Skin cancer etc. , CNG and hydrogen operated vehicles should be
used, more no. of trees should be planted, Chimneys in the Industries
should be upgraded so that most of the effluents should get filtered
down there.

8. The ozone layer protects the Earth from the ultraviolet rays
sent down by the sun. If the ozone layer is depleted by
human action, the effects on the planet could be catastro-
-phic.
Ozone is a bluish gas that is formed by three atoms of
oxygen. The form of oxygen that humans breathe in
consists of two oxygen atoms, O2. When found on the
surface of the planet, ozone is considered a dangerous
pollutant and is one substance responsible for producing
the greenhouse effect.