Senator ROBERTS (Queensland) (15:46): I seek leave to make a short statement. The PRESIDENT: Leave is granted for one minute. Senator ROBERTS: One Nation will be opposing this motion. When we discuss matters claimed to be based on science, we insist upon empirical data within a scientific framework that logically proves causation. We look forward to senators and other MPs who engage in this climate debate providing empirical scientific evidence which logically proves causation. Question agreed to.