Topic - Recently, Coles and Woolworths announced that they would phase out single-use plastic bags for a more environmentally-friendly, multi-use alternative (albeit at a 15c cost to customers). Write a persuasive piece of writing that either criticises or advocates for this change.
In Australia, most residents buy from these (you can probably leave that out) two prominent shops; Coles and Woolworths. These two main shops are the provider for both food and supplies needed in families. Recently, these two shops have announced that single-use plastic bags would be phased out for a more better alternative. You should specify what the better alternative is, in this case buying the plastic bags for 15c.
This is a great decision that they chose to make, these new bags would not be thrown out if they weren't single use and wouldn't be littered to possibly harming animals and their habitats. As this essay is formal, you should try to avoid using conjunctions such as won't, weren't and wouldn't. Instead try to be more formal and use will not, were not and would not. 
Plastic bags are being littered every day and every where, even though none of these people who litter can see the disaster it can make, the new multi-use bag is a greater choice. Not sure if it's just me, but the topic sentence of this paragraph isn't quite clear. In this sentence, you should try to specifically state your argument for the paragraph. 15 cents to a regular person is barely anything and yet the damage of littering can cost thousands or even the extinction of a certain animal. Wouldn't we all want to live in a friendly environment, without the extinction of any animals? Plastic bags isn't the right decision to keep the environment safe. I know that you didn't finish, but in this paragraph, I didn't quite understand your argument. I think you should try and stick to one main argument for each paragraph, and discuss only that. The rhetorical question at the end was nice though. 
AHH TIME 15:00
This topic was hard because I couldn't find any pros or cons except for the effect of animals... Examples for arguments could be: save the government money as they'll spend less money on plastic bags and less plastic bags end up in rubbish and in the sea. These are just the ones I can think of now, but I'm sure there'll be many more. 
Could anyone give any reason why it would be either good or bad? Thanks, I am going to write the creative one now.
I'm sure you're aware, but structure is extremely important in writing not only persuasive texts, but also narratives.
In the introduction of a persuasive piece, you should, as you've already done, state the topic you'll be discussing, briefly explain the topic (maybe even just 1-2 sentences if you can), and state your contention/point of view on the issue. You also need to briefly outline your arguments (you can argue 2-3 points. I always discussed 2 points, as that meant I could effectively argue them, with enough evidence/information to convince the reader. In my opinion, 3 points becomes too many, as in the 15 minute time frame, you cannot thoroughly discuss the arguments, and the paragraphs become too short and brief.)
In the body paragraphs is where you will be discussing your arguments. In the first sentence, you should concisely, but effectively state your argument, to inform the reader what you'll be discussing. You should try to be straight to the point here (this sentence is usually 1 sentence). You need to explain this topic sentence, and expand on your argument. Discuss the topic sentence further, and then you need to add evidence. In this time frame, it is quite difficult to add expert opinions and what not, but try to write what you can. You can try to discuss the negative consequences of the issue, and what the positives will be if your opinion is followed. At the end of the paragraph, you need to write a linking sentence, which effectively connects back to your main topic. In other words, you need to write a sentence that links what you have written in the paragraph, to your overall contention. Not sure if that made sense haha. Please ask if it doesn't.

In the conclusion is where you'll sum up your piece. In your first sentence is where you'll need to restate your contention, but in different words from what you wrote in the introduction. Then you'll need to summarise each body paragraph, very concisely. Make sure you don't add any other extra information in here, as that can sometimes happen unknowingly. Try to end the conclusion with a strong sentence, that leaves a solid impression in the reader.
Good luck!
