The group's news conference came three days after Monday's questionable shooting of a carjacking suspect by a Dallas officer. A witness has said the suspect had his hands up when the officer shot him in Pleasant Grove.

Moreover, there is evidence that businesses and consumers are adapting just fine. Trip Doggett, who oversees the state's electricity grid, recently said power demand doesn't seem to be increasing excessively even though Texas continues to add residents and businesses. Why is that? Programs that encourage customers to better monitor their energy use seem to be working and we're getting more electricity from wind farms.

Applause broke out among the VIPs invited to witness the first public test of the project, says the BBC's David Willey in Rome.

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