Find out when Nova and Frontline join forces to determine What's Up with the Weather? Man-made carbon dioxide has overloaded the earth's atmosphere Experts predict emission levels will triple in the next 100 years, with the increasing demand Greenhouse effect remains the subject of heated debate among scientists, climatologists and futurists Its a belief that either earth's temperature will rise by nearly 10°, melting arctic ice caps and paradoxically, bringing about a new Ice Age or stay relatively normal