Here is a wonderful gallery of underwater pictures. However, These pictures are only intended to illustrate what can be lost if we are not careful with the way we live in this world. While It's true that the worlds climate changes over the millennium, we are without a doubt contributing to changes in this last century. From third world countries trying to catch up, and in so doing so, not spending money to prevent pollution, to countries like the US that use an overwhelming amount of the worlds resources, and my sheer volume contribute immensely to pollution and global warming. Our progress is folly though. As the Earth's climate changes, species are lost. Raising the temperature of the ocean by one degree has serious ramifications. The” big conveyor” that is the Gulf Stream, could stop altogether. Most of Europe would be put into a virtual ice age. This may happen in our lifetime.We can't harm the earth,it will exist far beyond the events of humanity. The ecology of the planet is another thing, without a livable environment, we and the systems we need to sustain life will cease to exist.