What effect will these changes in population have on the environment and economy of Brazil?

I think the population change will surely have an impact on the environment as well as the economy.

As the population increases, there would be more demand for resources which will directly affect the environment such as more land would be required for housing. And that land will come from the existing vegetated area, thus decreasing the vegetation cover. The urban areas might increase as well with more urbanization. 

On the economic front, the standard of living might improve with the government investing more as the population increases. The government might have to spend more for the older population such as for retirement funds, considering that in the long term their size will increase. I think the working force will be the same, more or less.

Based on Brazil's current population age structure what do you expect in both the short term and long term to happen to Brazil's population?

Below is the population pyramid of Brazil for year 2010:

 We can see that the children(age group 5-19) and the working population(age group 20-54) is pretty high with the progressive decrease towards the older population.

I think that in the short term, the population will remain more or less the same or stable with not much substantial difference:

But in the long term, after around fifty years, Brazil's population pyramid is expected to change drastically with comparatively low birth rate and an even lower death rate. Which would mean that there would be a high population in the older age groups. This is evident from the expected population pyramid of 2050:

  


 

Why have i chosen IB Biology?

The IB program is an international program and so it is recognized by many countries. I am planning to go back to India after i graduate from high school and study the sciences there, so i think this is the most appropriate course for me to study.

Apart from this reason, i am interested in the sciences. This course includes a lot of important topics. This course is not only about theoretical knowledge but it also has a practical approach. That helps us in questioning and understanding the biological world.

So, this is why i have chosen IB Biology.

How is puzzle like science?

Science is about discovering the phenomena of the nature. The process of discovering can be called similar to solving a puzzle. There is always a problem to solve. As we begin looking for an answer, we find a lot of random information, which seems to make little sense to us. But step by step as we proceed, we see that all the pieces fit together to form a bigger picture or the information that seemed random to us at first points to a bigger fact.

The basic idea is that we have to relate and understand the order between various facts.