It is true that projections indicate the global population will increase and then stabilize at 9 to 11 billion by the end of the 21st century. While some people lean toward the viewpoint that this growth will lead humanity to significant challenges, I would argue that another enormous and unresolved problem will be the quality of the air.
There are clear arguments that the expansion of the population will be the reason to several difficulties. On the one hand, a lot of resources such as food, clean water, and energy will need to be produced. This means that a wide range of products will be required to feed approximately 11 billion people. Another reason is that many job opportunities will need to be created to avoid tension and hunger. For example, it is commonly believed that one of the prerequisites for the war in Syria was drought and unemployment.
On the other hand, I agree with the viewpoint that the rise of the inhabitans of the planet covers only one problem facing to humanity. Firstly, I believe that with harmful air pollution, neither 11 billion nor 10 billion people can survive. This is because pollution will cause catastrophes in various regions of the planet and increase the frequency of earthquakes, storms, and heavy rains. For example, last year, we witnessed a large number of earthquakes in Eastern Europe. Secondly, poor air quality is the main cause of lung cancer, and this will also be a significant problem by the end of our century, related to air pollution.
In conclusion, it seems to me that humanity should predict and plan for the impact of our life cycle on the planet. If we want to live in a balanced and prosperous world, we must prioritize environmental control and collaborate globally to ensure the well-being of future generations.