A major change that has occured in the earth is an increased of air pollution. The condition of air pollution in our earth getting worse, where as in the past, the air pollution was a rare occurance, but recent times it has become quite commonplace. The increasing of air pollution has already become a serious problem because it would have caused many and more damages. The condition of the earth's air is uncontrolled, threaten the life creatures and the environment inside. The increasing of fossil fuel using, the smoke of the forest fire and the smoke of the factories are the factors contributing towards the growing of the air pollution problem.
The first factor that has caused the increasing of the air pollution on the planet earth is the increasing of fossil fuel using. The burning of fossil fuel that's used for motor vehicle has produced more emisses which can be a threat for life creatures and the environment in the earth. The emisses such as carbon monoxide, carbon dioxide, etc are the pollutants that can pollute the air and decrase the air quality. These also can endanger human's health. In a long time, these emisses will be a real death monster for us if we do not try to decrease the fossil fuel using.
Second, the smoke of the forest fire is contributing toward the growing of the air pollution in the earth. The explossion of the population is one of the reasons why the forest fire occurs. The uncontrol population problem is urgent for human to find the place for their life. The way is open up the forest field by repeatedly chop down the trees, and also by doing the forest fire. Because the role of the forest is a main role for our earth, this problem can not be ignored. So, if the smoke of the forest fire or the other pollutions grow more and more, while the quantity and the condition of our forest get worse, the air pollution will be a very serious problem for everyone. And even if the forest extincts at this time, we will vanish from the earth.
Third, the smoke of the factories also have made the air condition to be more polluted. There are billions of factories around the world releasing pollution. Black clouds are seen over one factory, but it is repeated endlessly all over the world. As long as the factory is working, pollution is being created. This can be an acid rain, then damage the environment and make a life inside to be threatened.