Nice to meet you, here are some of my comments. They're just consultative. I hope we can help each other to improve writing skills.
Nevertheless, someone claim that such buildings should be destructed and replaced by new accomodations and workplaces.
> accommodation. do you use American English? It's better off being used in singular because it's an uncountable noun (in British English).
First of all, the present word is experiencing the blooming population.
> do you mean 'world'?
> 'blooming' and 'population' do not collocate. It's better off using 'the rapid growth of population', 'population explosion', 'population boom', 'rapidly growing population'...
According to a report published in 1995 of a prestigious British academic institution
> report on/of sth, I don't understand your idea. Do you mean "by"?
it was anticipated that the worldwide population would reach the level of 7 billion in 2050.
> I am not sure about this word. I'd better use 'reach a peak of'
it is the existence of those constructions that teach the youth about nations’ history
> teach sb sth
> This sentence is a bit misunderstanding.
> (It is that) the existence of those constructions could teach the youth nations' history.
Furthermore, is is frequent to witness the appliance of past architect in the modern buildings.
> appliance is a machine that is designed to do a particular thing in the home.
> architect means a person.