Related topics: climate change · carbon dioxide

Among 'green' energy, hydropower is the most dangerous

Many governments are promoting a move away from fossil fuels towards renewable energy sources. However, in a study published today, scientists highlight some of the ecological dangers this wave of 'green' energy poses.

Geoengineering could save Earth -- or destroy it

(AP) -- Brighten clouds with sea water? Spray aerosols high in the stratosphere? Paint roofs white and plant light-colored crops? How about positioning "sun shades" over the Earth?

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