Create a collage encapsulating the essence of the year 2024. It should include abstract symbols of time such as clocks or calendars, futuristic technology such as hover cars or AI robots, emblematic societal elements such as solar panels illustrating sustainable energy innovations, and global achievements like the planting of more trees. Also, include symbols of hope and progress, like an ascending rocket, symbolizing a promising future. Lastly, incorporate diverse humans of all genders and races who interact in a harmonious, progressive society. They should be seen working collectively on innovative projects, showing unity and collaboration.