The Water Cycle

1634 Words 7 Pages
What can be said about the resources of the earth? Is there a finite amount or are they limitless? How has humankind affected the earth over the last 200,000 years? Well, the resources of the earth are renewable in many cases, but they need time to replenish. The problem is that humans have damaged these processes of renewal by damaging the environment, and by consuming too many resources, in too short a time. This has led to irreversible damage in most cases, which not only threatens the environment, and the ecosystems directly related to it, but also humans, who depend on these resources. Over the last 200,000 years, humans have mastered agriculture, and have been able to invest time into science, and discovering many things. Unfortunately, …show more content…
It just changes form as it goes through the water cycle. It can be a liquid as water, gas as water vapor, or a solid as ice. Everything is linked, and nothing is self-sufficient, including water, and air, which are both essential for our survival. In fact, 70% of the world 's oxygen comes from algae from the ocean 's coral reefs. Coral is made from algae, and shells, and covers less than 1% of the world 's ocean floor, and are a very essential home for many organisms. Eventually after 4 billion years, trees were made, and they began to take the carbon out of the air, and release oxygen, making the planet habitable. Trees contain a green pigment called chlorophyl, which allows them to use the sun 's energy for photosynthesis. Photosynthesis is a process, where they use the sun 's energy, and carbon dioxide from the air, to make energy, and release oxygen as a byproduct. Trees defy gravity, and grow in a perpetual movement towards the sun, and the sky. The energy they create, is then stored inside their leaves, and wood. When the trees die, they decompose, and the energy, which was stored inside them breaks down to become …show more content…
We are catching them at such a rate that all our fish stocks are in danger of running out. Fish is an important food source for many people, not to mention an important part of natural food chains. Fossil water is something that is present underground in some desert areas. It is a non renewable resource, but it has been used in Saudi Arabia to irrigate land for farming. Unfortunately, since it is non renewable, they have completely exhausted it, and now they are forced to import all their food. The River Jordan has been severely depleted over the years, and 1 in 10 rivers worldwide, no longer flow into the sea for several months of the year. The Dead Sea has been losing its sea level every year due to the depletion of the River Jordan. India is becoming depleted of water, and in parts of India during the dry season, women are having to dig wells with their bare hands, just to try get water. It is estimated that by 2025, water shortages could affect over 2 billion

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