IEA advises investing in facilities to reduce the potent greenhouse gas. The U.S. government is already funding such programs.

A dramatic 2013 attack on California’s electricity system prompted security upgrades. Reviews are underway after recent similar assaults.

The energy industry is emphasizing the controversial technique over traditional drilling, partly for its shorter timetable.

Companies have to evaluate their prospects, then come up with a budget and manage crew and equipment logistics.