In 2012, some people believed the world would end according to an
ancient Mayan prediction. Thankfully, nothing happened. However, we
must realize that the Earth is, in fact, in danger. This danger is not from
asteroids or rogue planets, but from our actions and how they affect
the environment. There are three main threats to Earth and they are
global warming, loss of biodiversity, water and air pollution.
Global warming is caused by the release of greenhouse gases such
as methane and carbon dioxide into the air when coal and oil are burnt.
These gases trap heat from the sun in the earth's atmosphere, causing
temperatures to rise around the world and changing climate patterns.
In recent years, global warming has worsened. Many parts of the world
have experienced unusual and extreme weather resulting in drought,
floods and dangerous hurricanes.
Another problem Earth faces is the extinction of plants and animals.
In the past century, over 10,000 plant and animal species have died out,
and about 25 percent of all remaining species is already in danger of
disappearing. This can cause ecosystems to collapse. As part of the
ecosystem, we humans would be severely affected as well. For example,
the extinction of certain species of wild corn has created a loss of genetic
diversity, making corn grown in farms especially vulnerable to diseases
and pests, affecting our food supply. Because of this, it is important that
we recognize the danger of the extinction of plants and animals.
Yet another danger that we face is pollution of air and water.
Everyone knows the importance of having clean water to drink and
clean air to breathe. However, many cities around the globe are facing
problems with dirty air. For example, in Beijing, China, air pollution grew
to such hazardous levels at one point that it was unsafe for people to go
outdoors. As for water, many people assume that there is plenty of water
around, more than enough to replace the polluted water. However, few
realize that only 3 percent of the Earth's water is actually usable without
extensive processing. Thus, any water pollution at all is dangerous, and
can have a tremendously negative impact on our water supply.
To conclude, Earth is under serious threat from environmental
damage. It is our responsibility to take action to protect the environment.
Otherwise, the destruction of Earth is certain.