AMSTERDAM, Netherlands — They go by aliases and real names: Echo. Bluplanet. Ann Novek. Tig3933.Chris99. They stop nuclear reprocessing plants, save forests and whales, hound corporations and hold the feet of bureaucrats to the fire. Who ARE...

HOLLYWOOD, United States — Anybody who has watched an X-wing fighter explode in a luminous fireball in the vacuum of space knows that Hollywood is fast and loose with science. But if Hollywood has an iconic specialty, it's aiming the spotlight.

PENLY, France — Since the French power authority has refused to build wind farms, we built our own this morning on the grounds of a nuclear power plant in Penly, France. We put ten wind turbines up to protest the French government decision to...