Since New Year's we have heard reports of the mass and sudden, and not so easily explained, deaths of birds and fish, and every day following new reports of mass deaths, we get mass announcements from official experts telling us not to worry.
We also get announcements from non-experts telling us to most definitely worry, because, when birds fall by the thousands dead from the sky, and when fish wash up by the millions dead on the shore, that is a sign.
I dismiss the non-experts, and I don't know if the experts are right or not. There could be many reasons why these birds and fish are dying. Could be the severe weather brought on by global warming. Could be the fish and birds were caught in the wrong place at the wrong time. Could be anything.