CORRECTION/S:
I think this question means why people couldn't be solve this these problems up until recently. Is it right?
I think that there has been a dramatic increase in the number of cars. Although the car companies have already tried to minimize the problems associated with cars, they only advertise the good side. The govermment also did the same thing.
These days everyone tries to handle this problem. Car problems are big influence has a large impact on people's daily life lives. We need to look at this problem from a wider perspective because many things are related to it.
BE MINDFUL OF THE FOLLOWING:
Sentence completion
Word choice
Subject-Verb agreement
Sentence construction.
Happy hump day!