Environmental groups are suing the Trump administration over its decision supporting a company’s plan to pump up to 16.3 billion gallons of groundwater each year from a Mojave Desert aquifer and build a pipeline to sell that water to Southern California cities. Conservationists say the plan proposed by Los Angeles-based Cadiz Inc. would threaten natural springs and wildlife in Mojave Trails National Monument, which surrounds Cadiz’s land, 75 miles northeast of Palm Springs. Company officials disagree.