China Sunday became the latest country to declare war on plastic bags in a drive to save energy and protect the environment. Under new regulations, flimsy bags under 0.025 millimetres thick are banned and shopkeepers must charge for carrier bags. Those found breaking the law face fines and could have their goods confiscated. Shoppers in downtown Beijing and in Internet chatrooms seemed largely sympathetic to the idea. China, which goes through 3 billion plastic bags a day, is increasingly aware of the damage to the environment caused by its breakneck growth.