I selected air pollution in Mexico City as a title for our project because Mexico City has one of the most polluted airs in the world. There are also more articles related to it. Before we began to discuss this problem, we had to know what air pollution means.
Clear air consists of 78% nitrogen, 21% oxygen and less than 1% of carbon dioxide (CO2), argon, and other gases which exist in high layers of the atmosphere, and amounts of steam. When this balance changes, we can say that there is air pollution. It means that there are particles or gases in the air that are not included in the above percentages. These strange particles are called air pollutants. first webpage
It got 78 points. It has all information about my topic.
It is easy to read. It has many relevant graphs. The presentations good. It is up-to-date.
second webpage
• It got 74 points.
• It is easy to read.
• We can contact the author.
• We can also trust authority.
• But it is not up to date.
third webpage
it got 72 points. It has a clear expression. And it has many references and links. But the information is not accurate.
