Environment problem has been more and more serious in recent years. The decrease of the creature diversity can been seen as a problem, although i hold a different opinion.
The environment may be destructed easily when the problem of the loss of plants and animals is intensive. It is not only because the number of some animals may be expanded as lacking of enough predators in nature but also because the environment can not be restored easily if the complexity of creature circle is too simple. In this situation, when an important species of animals is extinct, the whole system of creature may break down and be hard to mend. In contrast, if there are many species existing, when one of the species disappears, the whole system can still run well.
On the other hand, some other people argue that green house gas can be seen as the most serious problem. Nowadays, with the development of economy and technology, more and more transport tools which need to burn the oil are running on the street and much harmful fume are emitted into the air. The consequence is that, the air quality in many places especial in urban areas are terribly bad. If such a trend continues, the life expectancy of people and other creatures will face a great challenge.
In my opinion, plastic waste can also be seen as a large problem to our environment. Many people have a bad habit of throwing these plastic goods like plastic bags, plastic bottles and so on away on the ground, but these plastic commodities can not automatically disappear with time passing by. Thus, much soil and ground are polluted by it and not suitable to grow vegetables any more. Providing farmers can not realize it and continue to grow them, maybe some poisonous food may become the dishes on our table.
To be concluded, while creature diversity is a very significant problem for us to consider, there are others environmental problems too.