Nowadays, with theliving in a fast-paced life we led, we hardly ever have enough time to cook for ourselves to have a heavyproper breakfast. or even cook for ourselves.

In this case, most of themSome people just grab a piece of bread and eat ithem on the way to their schools or companies, while some of work, while othemrs prefer readyto buy ready made meals.

When it comes to children, they are dying ofrom junk food like, such as burgers or fried chipsench fries, which contain food additives, because t. They think nourishingutritious meals are boring.

In the US, you use french fries. In GB, you use chips (ie: fish and chips)

On top of that, there are a large quantity ofmany TV advertisements on TV tothat promote some processed foods, which aims at children.

What’s more, younger generations prefer to go to restaurants since they believe it is a good way to gather togethermeet up and have snap-upquick meals.

However, some restaurants leave perishable food lying round outside the fridge, and someout, causing people to get food poisoning.

Nowadays, with the fast-paced life we lead, we hardly ever have enough time to cook for ourselves tor have a heavyfull breakfast.

'Heavy' implies rich, high fat or a lot of calories. 'Full' means a full meal. 'Large' can work too.

'Lead' has to be present tense because of 'nowadays'.

In thismost cases, most of thempeople just grab a piece of bread and eat ithem on the way to their schools or companieswork, while some of them prefer ready meals.

'It' because a piece of bread is singular.

When it comes to children, they are dying ofrom junk food like burgers or fried chips which contain food additives, because they think nourishing meals are boring.

On top of that, there are a large quantity of advertisements on TV to promote some processed foods, which aimsre aimed at children.

What’s more, younger generations prefer to go to restaurants since they believe it is a good way to gather together and have snap-upquick meals.

'Snap-up' refers more to getting a specific physical thing.

Nowadays, with the fast-paced life we lead, we hardly ever have enough time to cook for ourselves toand have a heavrty breakfast.

"heavy breakfast" would be a bad thing: like you eat too much.

"cook ourselves a hearty breakfast" is also okay

In this case, most of thempeople just grab a piece of bread and eat ithem on the way to their schools or companiesy, while some of thempeople prefer ready-made meals.

It's not specified who "them" refers to.

I'm not familiar with "ready meals", but maybe people use this.

When it comes to cChildren, they are dying from excess consumption of junk food, like burgers orand fried chips, which contain food additives, because they think nourishing meals are boringland.

"boring" is okay but "bland" is more precise. (Consider "nutritious" or "healthy" instead of "nourishing".)

On top of that, there are a large quantity ofmany advertisements on TV towhich promote some processed foods, whichand are aimsed at children.

What’s more, yYounger generations prefer to go to restaurants since they believe it is a good way to gather together and have snap-up mealsspend time together.

We don't need "What’s more" etc. at the start of every sentence. I don't know what a "snap-up meal" is.

However, some restaurants leave perishable food lying around outside the unrefridgerated, and some people consequently get food poisoning.

I added "consequently" to make the two parts of the sentence relate to each other.