I would do many different things to celebrate World Environment Day. I would participate in environmental marches in the city, conducting climate protests, public forums and panels, and political movements that call for more significant environmental policy action. It could be one that benefits the environment.
I could also get creative and makeup pamphlets illustrating what is going on in nature and climate in the world. I could educate other people and inspire them to do their part. I could assemble a group of people who orchestrate a cleanup activity in the area, such as the beach, park, or river.
I can endeavor to use less water by turning off the tap when I am brushing my teeth, and I could pay better attention to how much time I spend in the shower. I could walk to places instead of using a car or taking public transportation, which is another small gesture to help with the environment.