More CO2 will help more plants grow. More plants will mean more food for the animals, many of which will be used to feed increasing populations. Populations will increase because CO2 heat will open up Canada and Siberia for habitation. More heat will cause the atmosphere to hold more water, which will rain down on deserts to turn them into rich gardens for more population and food. More water in the atmosphere will make for more H2O2 (from cosmic radiation) so that more viruses and bacteria are killed off naturally. Less medical will be needed, and people will be able to spend more money of useful things, while living longer naturally. More people means more of us to solve the problems of traveling to the stars. We need more global warming.