A possible idea is to grow more algae in the sea. Algae is an underwater plant that lives in shallow waters and absorbs sunlight to create photosynthesis. If we can plant more algae there will be more plants to capture the carbon dioxide. 

We can also plant normal plants like bushes and trees. They also absorb carbon dioxide. Planting trees will make a bigger difference than planting small plant pots, however, both will help the environment.

Another idea is to have paler oceans. We need paler oceans because then less light will reflect off, absorbing the heat. We can also stop using public transport. Walking is a better option because it doesn’t release greenhouse gases.