Tokyo Electric Power promised to compensate those Japanese who were evacuated from their homes because of the nuclear crisis at the Fukushima Daiichi power plant.
A major climate change case will come up before the Supreme Court next week.
Environmentalists sent thousands of comments in opposition to a natural-gas drilling project near the Delaware River.
Investment in renewable energy plummeted to the lowest level in two years.
Toyota will operate at half-capacity in Japan amid the fallout from the massive earthquake and tsunami that hobbled the country in March.