Take a look at the Baltic
Sea on a map!
Sea is connected to the Atlantic by a sound between Denmark
. Take the fate of the Baltic sea as a model for what might happen to our common sea!
I started teaching biology and environmental protection in 1980 in Kalmar, a city on the east cost of Sweden
. The sea was full of life, and we studied all the plants and animals
. But about fifteen years later we noticed how algae growth increased and a few years later water animals
slowly died out. Cod, pike and many other fish
species could not be found anymore. The same thing happened to the eider ducks.
Together with my pupils I have visited Poland
and Kaliningrad where we have found the same problems due to too much nutrients. (Possibly there are other causes, too, all around the Baltic.)
During the last fifteen years we have had algae blooms by algae giving us skin problems. The water
is slowly getting cleaner due to efforts taking place in most countries around the Baltic.
From this summer we are not allowed to dump any toilet waste into Swedish waters. Most sailors have put in holding tanks
and some have chosen compost toilets. Around our coasts stations, where you can empty your holding tank
, have been build. People with compost toilets can empty the urine there, if they don’t give it to a farmer or use it (diluted) in the garden. The compost part is also good for plants, and must not be dumped into the sea, where it acts as a fertilizer..
In lakes phosphorous is limiting algae growth, in salt water
it is nitrogen. Most nitrogen in human waste comes from the urine.
Conclusions: Any toilet, that collects the waste to be taken care of in order to return the nutrients to the soil, is a green toilet. If we go on dumping waste into the seas, we risk the well being of coming generations.