Did you know that over half of the world's population - that's 3.5 billion people - live in cities? That's a large number of people living in close quarters, and if we're not careful, it can lead to serious environmental problems.

The quality of our environment, including water, sewage, and air, is heavily impacted by all those people living in such a small space. Even though cities only cover 3% of the Earth's surface area, they consume 60-80% of the world's energy and are responsible for 75% of carbon emissions. Moreover, the changing climate is wreaking havoc on forests, animals, and entire ecosystems.

Climate change is the leading cause of the loss of biodiversity, with the increase in greenhouse gas emissions being the biggest contributor. According to the World Wildlife Fund, 30% of tree species worldwide are at risk of extinction, and a staggering 58% of Amazon tree species are threatened.

It's clear that we have serious environmental problems on our hands, but who will solve them? We all lead such busy lives that it's easy to feel overwhelmed and not know where to start. We see all these environmental holidays on our calendars - World Forest Day, World Bee Day, International Clean Air Day - but do we truly understand why they matter and how we can make a difference?

We believe that small actions can lead to significant changes. You don't have to join an environmental group or devote all your free time to making a difference. Just doing one small thing in your daily life, such as planting a tree or reducing your carbon footprint, can make a big impact over time.

Let's all do our part to protect the environment for ourselves and future generations.

Introducing Greendar, a service that helps you protect the environment in your daily life.

Most to-do list services focus solely on the individual user, meaning the service does not intervene in the user's to-do list. However, Greendar is a service that helps you protect the environment in your daily life by providing you with to-do lists relevant to environmental holidays.

Greendar supports both Google login and regular email login. Once you complete registration, you will be directed to the main calendar page.

At the bottom of the main calendar, you can see the ratio of completed tasks related to environmental protection and personal tasks.

You can view environmental holidays by clicking on a day in the calendar and receive to-do lists that can be executed on those holidays.

You will receive a to-do list for small environmental actions you can take over a week, and once you complete the to-do list, you can upload photos. In addition to the environmental to-do lists provided, you can also create and execute personal to-do lists. Once the to-do list is complete, you can upload photos and view them later when you have completed the task.

At the bottom of the calendar screen, there is an image and brief description of an endangered species of animal. When you touch the image, you'll be directed to a page with more detailed information. The endangered species of animals and their descriptions are prioritized by country.

If you want to make a bigger impact, you can add friends through our friend addition page and view their calendars.

Small actions can lead to big changes. Join the movement and start making a difference with Greendar.

Greendar, protecting the environment for ourselves and future generations.