BEIJING, China (AFP) — Chinese cities had fewer “good air” days in the first half of 2017 compared to the same period last year despite government efforts to curb incessant smog, according to official data. China has vowed to target coal-burning and vehicle emissions, increase investment in clean energy and punish polluters in a bid to improve the air quality of the world’s second largest economy. But the measures had yet to bear fruit in […]