TOKYO/DUBAI -- To achieve net-zero greenhouse gas emissions by 2050, the U.S. and Europe are cutting back on investment in oil and gas production. But it is unclear whether they can promote the adoption of renewable energy quickly enough to slow the growth in demand for fossil fuels, raising concerns over potential energy shortages.

Datawatch
Global energy shortage looms as investment in fossil fuels slides
Decarbonization push may cut oil output 73% by 2050 despite lack of alternatives