LiveScience: It’s a case of pick your poison for nearly half of all the plants and animals living in tropical forests. By the end of the century, either climate change, deforestation, or a combination may force them to adapt, move or die, a new study suggests. Tropical forests hold more than half of all the plant and animal species on Earth. But by 2100, only 18 to 45 percent of the plants and animals in tropical forests may exist as they are today, according to the first study to look at how …