An extraordinary plan to revive the Dead Sea could ease tensions among Israel, Palestine and Jordan. Or it could create an environmental disaster.
Build new, low-impact hydropower facilities but keep the old: Large dams already in existence can be improved.
Hydropower will never be the complete answer to emissions-free energy production in the U.S., but a strong case can be made for it becoming a useful part of the answer.
Looking at the untapped potential for hydropower to supply the U.S. with carbon-free electricity, Lea-Rachel Kosnik finds ample opportunities for expanding hydro.