Ourand ourhave given us theto affect the climate. How will we use this power? Are we willing to tolerateand complacency in matters that affect the entire human family? Do we value short-term advantages above the welfare of the ? Or will we think on longer time scales, with concern for our children and our grandchildren, to understand and protect the complex life-support systems of our planet? The Earth is a tiny and fragile world. It needs to be cherished.