One hundred years ago, when the Communist Party of China was founded, the nation was ravaged by wars, coerced by foreign powers, and suffered from a dilapidated economy and corrupt politics. It was weak in almost all respects. After a century of struggles, persistence and triumphs, the nation transformed and was reborn. Data shows how far China has come since then. In this episode of our special series "China By Numbers," we look closer at the figures that showcase the nation's environmental protection efforts.