Some people say that new technology is the answer to climate change. It is convenient to think that new technologies will provide all the energy we need so that we don't have to make any changes in our own lives. And it's true that some technologies, like wind and solar, are an important part of a more sustainable future. But when we remember that the Earth is a finite ecosystem in which there is limited availability of the resources and energy required to build technologies like windmills and solar panels, it becomes clear that conservation is the most important action we can take. Assessing how much energy and resources we really need, and learning to live with less, will show the leadership required to respond to climate change. So even with the promise of new technologies, turning off the lights ( and encouraging friends, family and political leaders to also conserve energy ) is important.