“A spokesman for [SEPA] said: ‘Our officers are comfortable that there is no environmental risk to the River Cree as a result of the bottles being released and, following inquiries, understand almost all of the bottles were contained and removed from the river fairly quickly by local residents.’ …
‘It was never my intent to harm the environment. It was more accident, naivety as well as stupidity in the execution. … It was just my intention to send a wee love bottle with a message to someone I had not yet met.'” http://www.bbc.co.uk/news/uk-scotland-south-scotland-40738484
“The SnotBot is a small drone that can hover over a whale and then collect samples of snot, or whale blow [which] can reveal information about the whale’s DNA, metabolism, health, hormones and stress. …
This kind of non-invasive research is in stark contrast to the whale research undertaken by Japan, whose vessels have just left port once again to kill whales so that they can be dissected and supposedly studied for scientific reasons.” http://uk.whales.org/news/2017/06/whale-snot-secrets-revealed-by-flying-robot
“Scientists working at Bath University have now come up with a method to make microbeads out of cellulose, a starch found in wood and plants.
Tests have been carried which show the beads can be processed to be soft or hard but can also biodegrade into sugar in a short period of time.” http://uk.whales.org/news/2017/06/new-solution-to-plastic-pollution
Has anyone tried using sand? It may be less of a problem for marine life.