Global warming is caused by human activities that increase greenhouse gas concentrations like the industrial revolution, deforestation, and burning fossil fuels. This leads the average global temperature to rise with serious environmental damages and consequences for humans, animals, and living species. The ozone hole is a thinning of the ozone layer reaching twice the size of the United States, posing risks to human health and ecosystems. Deforestation removes 30% of the world's forests, important biodiversity hotspots, though efforts to control it face economic interests. Greenhouse gases in the atmosphere naturally retain some of the sun's heat, but human emissions are intensifying the effect and causing overheating. Effects include melting glaciers, temperature rises, disruptions to weather

1. Global warming

2. Global warming is a recent phenomenon that began
with the growing industrialization of the world, for
which the average temperature of the Earth and oceans
increases more and more, with serious environmental
damages, and dramatic consequences on
humans, animals and all living species on earth..

3. Causes:
 Global warming is a growing phenomenon; it is caused
by human activities that increase concentrations of
greenhouse gases in the atmosphere: industrial
activities, deforestation, burning of fossil fuels, but also
agriculture and especially intensively farmed.

4. The ozone hole
Ozone is a gas which is present in very small quantities in
the atmosphere, where it is formed during
thunderstorms. In the lower atmosphere , its
distribution is not uniform, but its concentration
increases with a maximum at about 25 km, where it
forms a thin layer, the ozone layer .

5.  The ozone hole is a thinning of the ozone layer, which has
reached an area equal to twice that of the United States is a
serious problem for all humanity . The hole in the ozone
and stratospheric ozone depletion, in general, is currently
not an immediate risk to human health and has been
recognized as a very serious problem throughout the
terrestrial ecosystem , so it was treated as such. Harmful
gases that were the main cause of the phenomenon have
recently been banned: the results obtained are very
encouraging. But it is also true that the problem of global
warming persists, caused by other phenomena such as the
“greenhouse effect”: it is still a long way to go to get to a
world finally free from all the plagues that afflict it today!

6. Deforestation:
.
 Deforestation is the breaking of trees for commercial reasons or
to exploit the land for the cultivation. About 30% of the land
surface of our planet is still occupied by forests: they are mostly
concentrated in the areas straddling the equator and areas of
continental climate. Forests are also important ecosystems with
high biodiversity, where many species are also an object of
aesthetic beauty, wildlife and cultural heritage of the
environment in general. Methods to control and reduce
deforestation are numerous, but all depend on the political will
to implement them, in contrast with strong interests economic..

7. Garbage
They are classified according to the source in: municipal
waste, special waste, green waste and, according to their hazardous
properties, in hazardous waste and waste not dangerous.
Industrial waste are particularly dangerous for humans and the
environment, because many of these contain chemicals toxic to
action, a carcinogen. For this reason, the law defines these
"hazardous waste. Even municipal waste can be dangerous because
they contain substances that can promote the proliferation of
pathogens or the so-called " disease vectors ", ie those animals , like
cockroaches , flies, mice, rats, etc. . which may carry pathogenic
microbes, making them come into contact with humans. This risk is
not as high as is commonly believed .

8. Greenhouse
 The greenhouse effect is a natural phenomenon that occurs
normally in all the planets, such as Venus, Mars and Saturn.
Even on Earth this particular phenomenon happens, which
has the same function of what happens in greenhouses for
growing: the sun heats up the planet, and its rays through the
atmosphere warm the ground. Then, as in a greenhouse, the
Earth's heat is reflected on the atmosphere, but,
encountering the barrier composed of particles that are
found naturally in the air, a few stops in the sunlight and are
retained in the stratosphere. Unfortunately, in recent years,
this phenomenon is intensified, bringing the heat to stay
longer in the atmosphere, overheating.

9. Consequences:
- Melting of glaciers
- Rise in temperatures
- The ozone hole
- Upsetting of the streams
- Extinction of animals and plants
- Eutrophication and desertification

10. Effects of global warming on
humans
Keeping the temperature of the Earth around the average
values ​suitable for human life is mainly due to four factors:
internal heat of the planet; solar radiation, which provides
energy to the greenhouse effect; presence of the
atmosphere, which reduces the daily and seasonal temperature
variations; natural greenhouse effect, which amplifies the
thermal effect of the solar radiation. The alteration of these
parameters is the cause of global warming. The man, burning
fossil fuels such as coal, gas and oil and destroying forests, is
dramatically increasing the amount of carbon dioxide (also
known as carbon dioxide) in the atmosphere of the Earth. This
translates into an increase of the greenhouse effect and a
consequent rise in temperature. Most scientists agree on the
real global warming as a result of human activities and not just
as a matter of course.

11. How can we stop global warming?
Unfortunately, the efforts undertaken so far are few and
too little incisor. There are those who assume a "back to
basics" by stopping the growth and even embarking on a
path of decline, but perhaps, without exaggeration, it
would be enough to use all the available knowledge and
make good use of renewable energy sources, and
especially promote a coscience aimed at energy saving
and reuse.