I need your help with a writing task from an IELTS test. Please tell me what you think.

The topic is:

"In some countries the average weight of people is increasing and their levels of health and fitness are decreasing.
What do you think are the causes of these problems and what measures could be taken to solve them?"

Obesity is one of the biggest problems of the 21st century and can be found mostly in western and more advanced societies. Linked with heart diseases, obesity is a life threatening issue and as such it has to be addressed.

To find the solution, we have to find the roots of the problem first. Why people consume bigger quantities of food and decrease their fitness? The first issue is the quality of food we consume. Eating habits have changed as access to fast food, that contain high percentage of fat, is easier today. Also long working hours do not allow people to cook healthy meals at home.

The second most important issue is the lack of exercise. Work is also the main problem as it leaves very few free hours in which people usually prefer to spend with their families or relax after a hard working day.

Jobs have also changed. In our days working places are usually offices and employees are sitting a lot of hours in front of computers or controlling machines while years ago, manual working jobs were significant more.

Last, but not least, are the conveniences that come the progress of technology. We no longer climb stairs as we have elevators and escalators, or we don't walk to grocery stores because we use cars and motorbikes. Of course technology is not the problem but the way we use it.

So what can be done to to solve the problem? How do we convince ourselves to change our way of living? First of all we need campaigns showing how dangerous and life threatening obesity is. Today there are more people than ever who are dependent from others and can't fulfill their own needs because they are overweight. Courses about healthy way of living should be part of school curriculum where students will learn from early age how important healthy diet and exercise is. Also money should be spent in research to find efficient drugs that will solve the problem.

Unfortunately, kids usually inherit their life style from their parents and this is one the main reasons of child obesity which is one extra reason to change our way of living. Exercise and healthy diet equals longer and better life and this is the way we have to live and teach the next generation.