Kiev says that rebels have blocked rescue workers from reaching the mine, where dozens are feared dead.
President Michelle Bachelet recently announced her 2014-18 energy program, pledging to expand a liquefied natural gas port and support renewable energy sources.
If any European country could have a US-like fracking boom, it's Poland. But optimism has waned.
When Chevron tried to start exploratory drilling, local farmers moved quickly to stop them.
Official information on the Pemex blast last week is still scant, but the explosion may have shifted perceptions on whether the state-owned oil company should open up to private investment.
Gasoline is a very visible price, and closely watched by many drivers. Petroleum prices impact many products, from food to industrial production. While the cost of crude is the major factor in gasoline price volatility, some countries levy taxes on fossil fuels. Here are ten countries where high gas prices are the norm, according to British insurance firm Staveley Head.