Proposition 45 would create streamlined procedures for a range of construction projects, from transportation and water infrastructure to green energy development, to receive approval under the California Environmental Quality Act, the state’s signature land use law. The measure is pushed by business, construction and affordable housing advocacy groups who say the state’s burdensome regulations and the lawsuits that often dog development projects are causing California to fall behind in building essential infrastructure. A large coalition of environmental groups, joined by some labor unions and the California Democratic Party, oppose the measure, saying that Proposition 45 would lead to less local control over building projects and more environmental degradation.