The extinction of the 
                     animals
The extinction of the  animals is another problem that have a lot of solutions, for example, do not hunt, or use the animals for researches or also cutting down forest were they live.
Another solution is using our technology for help the animals that are pregnant or animals that are sick or animals that are wounded, but especially, the animals that are extincting.
Examples of animals in extinction are the starfishes, the whales, the pandas, the peregrine falcon, the  turtles, the manatee, the tiger...etc.