The document discusses the marine environment, which covers over 70% of the planet and contains 97% of the earth's water. It notes that marine ecosystems hold 80% of all life on the planet and lists species diversity in the Philippines, including over 800 coral species. The marine environment is important for producing oxygen, moderating climate, and providing food and livelihoods. However, it faces threats such as pollution, overfishing, and climate change, negatively impacting species like turtles, sharks, and seahorses. The document encourages learning about and protecting the ocean.