Sea Change By Sylvia Earle. Why do we need the oceans? Drive planetary chemistry Govern climate and weather Provides cornerstone of life support system.

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Presentation transcript:

Sea Change By Sylvia Earle

Why do we need the oceans? Drive planetary chemistry Govern climate and weather Provides cornerstone of life support system Our future and state of ocean are one. (moon/mars)

An Intelligent Alien Might Notice That… Planet dominated by salt water Clouds of fresh water come from the sea

History of life on Earth (human time) Life began 3.5 billion years ago in the sea Early primates 60 mya Early humans 5 mya Modern humans 10,000 years ago Exploding population ( over 6 Billion people)

World Population

Human Impact Removal of life from oceans

Human Impact Addition of toxic wastes

Human Impact “At night astronauts witness:”

Human Impact Squandering fossil wealth

Human Impact Highways form barriers

Human Impact Single species agriculture

Human Impact Cement/asphalt

“We have the power to damage the sea, but no sure way to heal the harm”

Why have we not studied oceans more? Culture- “look to the stars.”

Why have we not studied oceans more? The view that the ocean is vast and resilient.

Two Centuries Ago, There Were No… 40 mile long drift nets

Two Centuries Ago, There Were No… Mega Trawlers

Two Centuries Ago, There Were No… Acoustic Fish Finders

Two Centuries Ago, There Were No… Factory Ships

Two Centuries Ago, There Were No… Global Market Distribution Systems -Tokoyo market, 2000 tons of marine life sold each day.

Two Centuries Ago, There Were No… Nuclear Wastes

Two Centuries Ago, There Were No… Nerve Gas Disposal Sites

Two Centuries Ago, There Were No… Sewage Sludge

Two Centuries Ago, There Were No… Oil Spills

Two Centuries Ago, There Were No… Plastic Debris

Two Centuries Ago, There Were No… Pesticides, Herbicides and Fertilizers

Earl’s Hope For the Future The greatest threat to the sea and to the future of mankind is ignorance. Educate

Here is how you can help 10 things you can do to save the ocean.