The European Commission proposed on Tuesday to EU nations sweeping new sanctions against Russia, including banning imports of coal, wood, chemicals and other products worth about 9 billion euros ($9.86 billion) a year.  The European Union also wants to propose a ban on exports to Russia worth another 10 billion euros a year, including of semiconductors, computers, technology for LNG gas, and other electrical and transport equipment, the source said.  Russian vessels and trucks would be prevented from accessing the EU, further crippling trade, the source said, with exceptions made for energy products ...