Energy conservation
Paris Mayor Anne Hidalgo announced the monument will go dark at 11:45 p.m. daily, beginning Sept. 21.
Officials fear blackouts in nation's largest state as a blistering heat wave rockets temperatures into the triple digits.
Here's how to help kids reduce their environmental impact from a young age.
Nigeria doesn’t have enough electricity to meet demand, and the little there is, is expensive and largely unreliable.
