cromwell wrote:We can't keep on like this.
Of course we can.
I am forever reading that the planet can easily sustain 10 - 12 billion of us due to advances in farming technologies and the fact that only a fraction of the land is urbanised. "Onwards and upwards" they cry, we are humans, no problem is insurmountable.
Manxie, the turtle video in the link is so poignant. I was watching one ot the minor channels on Freeview and there was a turtle with its back flipper caught in the handles of a supermarket bag. The bag acted like a sea anchor and the poor thing could only swim in circles while being at the whim of the ocean tides. In Blue Planet II there are scenes of an albatross feeding its young a strip of plastic, this is a known problem for many sea birds. There was also a scene of a pilot whale with its left flipper wrapped in a plastic tarpaulin. The North Sea is pretty much like the seas around the IOM being shallow, about 300 feet, much less on the Dogger Bank. Where once there were clams, molluscs, coral and sea grasses .. and fish, it is now a virtual dessert. It only took us 150 years to destroy it.
Many of us will have heard of such things as the Pacific Garbage patch. This throws up an image of a plastic raft of bottles, bags and takeaway trays as in my original post: it is not the case. The large plastics are more often found in coastal waters where they wash up on beaches causing their own problems. It is a particular problem in the Indian ocean, the South Atlantic, South Pacific - East and West, and SE Asia.
The garbage "patches" are actually ocean gyres where the waters spin in roughly the same place all the time, think Dyson vacs. They are where the larger items which have broken down accumulate and are further broken down as these columns of water rise and fall. It is the smaller (microplatics) from these that get into the food chain and are transported around the globe.
When Suff says we need long-term actions in the region of 50-1000 years he is not wrong. If we stopped polluting the seas today it would take that long, and then some, to return them to their pre plastic state. Twenty years ago the gyre "patches" were unheard of. In that time it is estimated that we have thrown 160 million tonnes of plastic waste into the sea. If we go back to the time when plastics really took off the estimate jumps to 350 million tonnes. Today we are dumping 8 million tonnes every year and that is increasing year on year.