When your feeling down, do you know you can change it, like that. Put on a beautiful piece of music, start singing, that will change your emotion - or think of something beautiful, think of a baby, maybe one you love, really keep that thought in your mind, block out everything but that thought. I guarantee you'll start to feel good.
What we're also looking at, if we do not transform our energy system, is more international war and conflict as countries fight over limited natural resources, including water and land to grow their crops.