Since undertaking market reforms in late 1970s, China has enjoyed an economic boom -- but the economic progress has also produced serious environmental damage and pollution problems. Margaret Warner reports on China's environmental woes and their impact on the run-up…

New numbers released by the government Thursday highlighted the continued weak performance of the national economy, with the Commerce Department reporting an anemic 0.6 percent increase in the gross domestic product in the final three months of 2007.