When we are young, we learn that
tigers and sharks are dangerous animals. We might be scared of them because
they are big and powerful. As we get older, however, we learn that sometimes
the most dangerous animals are also the smallest animals. In fact, the animal
that kills the most people every year is one that you have probably killed
yourself many times: the mosquito.
While it may seem that all
mosquitoes are biters, this is not actually the case. Male mosquitoes eat plant
nectar. One the other hand, female mosquitoes feed on animal blood. They need
this blood to live and produce eggs. When a female mosquito bites a human
being, it transmits a small amount of saliva into the blood. The saliva may or
may not contain a deadly disease. The result of the bite can be as minor as an
itchy bump or as serious as death.
Because a mosquito can bite many
people in the course of its life, it can carry diseases from one person to
another very easily. Two of the most deadly diseases carried by mosquitoes are
malaria and yellow fever. More than 700 million people become sick from these
diseases every year. At least 2 million of these people will die from these
diseases.
Many scientists are working on
safer and better ways to kill mosquitoes, but so far, there is no sure way to
protect everyone in the world from their deadly bites. Mosquito nests can be
placed over beds to protect people against being bitten. These nets help people
stay safe at night, but they do not kill any mosquitoes. Mosquitoes have many
natural enemies like bats, birds, dragonflies, and certain kinds of fish.
Bringing more of these animals into places where mosquitoes live might help to
cut down the amount of mosquitoes in that area. This is a natural solution, but
is does not always work very well. Mosquitoes can also be killed with poisons
or sprays. Even though these sprays kill mosquitoes, they may also harm other
plants or animals.
Although mosquitoes may not seem
as scary as larger, more powerful animals, they are far more dangerous to human
beings. But things are changing. It is highly likely that one day scientists
will find a way to keep everyone safe from mosquitoes and the diseases they
carry.
As used in paragraph 2, minor most
nearly means
Philadelphia is a city known for
many things. It is where the Declaration of independence was signed in 1776,
and it was also the first capital of the United States. But one fact about Philadelphia
is not so well-known: it is home to nearly 3,000 murals painted on the sides of
homes and buildings around the city. In fact, it is said that Philadelphia has
more murals than any other city in the world, with the exception of Rome. How
did this come to be?
More than 20 years ago, a New
Jersey artist named Jane Golden started a program pairing troubled youth with
artists to paint murals on a few buildings around the city. Form this small
project, something magical happened. The young people involved helped to create
magnificent pieces of art, but there were other, perhaps more important
benefits. The young people learned to collaborate and get along with many
different kinds of people during the various steps required to paint and design
a mural. They learned to be responsible, because they needed to follow a
schedule to make sure the murals were completed. They also learned to take pride
in their community. It is hard for any resident to see the spectacular designs
and not feel proud to be a part of Philadelphia.
Take a walk around some of the
poorest neighborhoods I Philadelphia, neighborhoods full of broken windows and
littered front steps, and you will find beautiful works of art on the sides and
fronts of buildings. Of course they murals are not just in poor neighborhoods,
but more affluent ones as well. Special buses take tourists to different parts
of the city to see the various murals, which range from huge portraits of
historical heroes, to cityscapes, to scenes depicting the diverse ethnic groups
that call Philadelphia home.
As a result of its success, the
mural program created by Jane Golden has now become the nation’s largest public
art program and a model for to troubled youth.
Based on information in the
passage, the author most likely believes that
