For this year's Earth Hour, set for 8:30 p.m. Saturday, more businesses and governments are expected to take part in the campaign to turn off the lights. The aim: at least 1 billion participants.
New survey shows 30 cities saw home prices rise in the third quarter.
The Amazon Rainforest is one of 28 sites picked as finalists in a global poll to name the New Seven Wonders of Nature, conducted by the Swiss nonprofit New7Wonders Foundation. The Brazilian Amazon, pictured here, harbors 40 percent of all remaining tropical rainforest, playing a vital role in global biodiversity and in protecting the earth's climate.
Earth Talk: Biomass has significant ecofriendly potential for power and heat, experts say.
Twenty-eight green groups compile 359 pages of suggestions, hoping for a green revival post-Bush.
Readers remember the friendships they formed through the Monitor's old pen-pal column.
Water and chemicals injected at high pressure can extract more gas – and possibly pollute drinking water.