As millions of people around the world take part in the Global Day of Action on Climate Change, big businesses are announcing sweeping environmentally-friendly plans.
Amazon pledges to be carbon neutral by 2040, ten years earlier than proposed by the Paris Climate Agreement. The company has also ordered 100,000 electric delivery vehicles to reduce its fuel consumption.
Google plans to spend $2 billion in the biggest corporate purchase of renewable energy in history, including millions of solar panels and hundreds of wind turbines.
Small businesses in Ireland are also making efforts to be more sustainable but they are facing obstacles and expense.
Business woman Angela Ruttledge, co-owns two restaurants in Dublin - Olive's Room and Woodstock.
Olive's Room is based in St Anne's Park which is a Dublin City Council biodiversity park, and so the restaurant has its own allotment and is able to compost some food and coffee grounds using facilities in the part. However, it is more difficult when it comes to reducing packaging waste.
"Two years ago, we all discovered that cups are not recyclable. You have to go to the ReCup for a recyclable cup and that's great, but then you have to wash those cups out because they won't be taken away if they are not completely clean, so that adds a labour cost," Ms Ruttledge said.
"Then you have the compostable cups which are great because in a commercial composting facility, they break down much quicker. The ReCup cups are Irish but the compostable cups come from the far side of the world so you want to do the right thing by the Irish economy as well."
"All the compostable packaging comes wrapped in single use plastic, as does all our dry goods, vegetables and fruits - just like consumers would go into the supermarket and be so frustrated to find vegetables wrapped in plastic," she explained.
"It is a question of pushing back with suppliers and they are pushing back with the factories. It's really difficult and you feel like you are knocking your head against a brick wall sometimes," the business woman admitted.
Even though the business is reducing waste, that does not mean it is reducing costs.
"Absolutely not. For example, we need to use the single use plastic gloves when we are making sandwiches or serving food. They are two cents a glove. If you want to get a biodegradable one, they are eight cents a glove," Ms Ruttledge said.
"Or the little jam take-away pots, that people like if they are having a scone to go. They are thre cents for a plastic one, but four cents for a compostable one."
Ms Ruttledge said all of these costs add up over the course of the year, and that's where a business survives or fails.
The move to be more sustainable is being driven partly by customers, and by her desire for her business to be more sustainable.
"You will see people coming with their own cup which is fantastic and then they get a discount, which is part of the conscious cup campaign. They will go mad if they see a straw in the cup that they haven't asked for, which is great again. We use compostable straws - again more expensive than plastic straws, but we want to do the right thing."
The business woman would like to see some radical action. "We took radical action on charging for plastic bags. I'd like to see a complete ban on single use plastic. I'd like to see a ban on plastic bottles as well. We make money from selling bottles of water, but I would like to see those plastic bottles banned."
Minister for Climate Action and Environment Richard Bruton has said he would like to introduce a nationwide ban on single use plastics and he is considering applying fees to manufacturers who wrap supermarket products in non-recyclable plastics.