Since 1940 we've been producing and disposing more and more plastic in the ocean. In 2013 alone we estimate to have produced about 300 millions of tons of plastic - the same weight of all humanity (flesh and bones) in plastic, only in one year. Plastic is toxic. Plastic ingestion can lead to the development of infections, cancer or even death. Plastic floats for hundreds of miles, far away from those who produced it. Plastic may change our lives in a very bad way if we don't take action now.

What is the problem we are trying to address?
We are trying to sense plastic in the ocean. What do we mean by "sense" :

• Localise (where at what moment - timestamp)
• Qualify (what)
• Quantify (how much of it)

The oceans are huge, we know plastic is out there, but it would make it a lot more easier to clean if we know where it is. Until recently we thought we would find ten to a hundred millions of tons of plastic at the ocean surface. A recent study suggests that plastic floating at the surface of the ocean accounts only accounts for 34,000 tons maximum.

Where is 99% of the rest of the plastic we thought we would find?

• A/ Does fishs / turtles / birds eat it? Digest part of it? Poop it?
• B/ Does it sink at the bottom of the ocean?
• C/ Does it breaks down so small, it releases all it's chemistry?
• D/ Does it reaches the beach?

Today, we don't know in what proportions and where plastic is, which is concerning. For instance, if a big part of plastic was consumed by marine animals in that kind of quantity, it would have devastating consequences on the food chain we are part of. It might explain partly why we have already killed 90% of the ocean large fishes since 1950 and corroborate the theory that by 2048 all large fish in the ocean would be gone.