California Proposition 4 2024. Approving proposition 4 would authorize $10 billion in debt to spend on environmental and climate projects, with the biggest chunk, $1.9 billion, for drinking water. Now declared proposition 4, the legislation will be put before voters this fall for their consideration.

Proposition 4 is a $10 billion bond to help the state pay for efforts to address the impacts of climate change, including boosting water recycling, flood control. Proposition 4 allocates $10 billion to help prepare californians for the impacts of climate change.