California’s bedrock environmental law has helped protect residents, wildlife and natural resources from pollution and other negative effects of development countless times since then-Gov. Ronald Reagan put it on the books more than half a century ago. But the California Environmental Quality Act, better known as CEQA, sometimes is weaponized by competing businesses, labor unions and anti-development neighbors who aren’t necessarily motivated by environmental concerns. … Supporters say the law has blocked or forced changes for hundreds of projects that would have worsened air, water and soil pollution…. Witnesses spelled out those competing realities during an all-day hearing Thursday before the Little Hoover Commission which, for the first time, is studying whether to recommend changes to the environmental law.