The effects of environmental change on birds
OK, so we’ve been looking at how man-made changes in our environment can affect wildlife. Now I’ll discuss a particular example. Let’s take a look at mercury. Mercury’s one of the 120 or so elements that make up all matter, and it has the symbol Hg. It’s a shiny, silvery substance. You may have seen it in old-fashioned thermometers, but it’s not used much for domestic purposes now because it’s highly toxic.