The document discusses alternatives to HCFC blowing agents for foam production. It summarizes mature technologies like hydrocarbons, HFCs, and CO2 that have limitations regarding cost, safety, or environmental impact. Emerging technologies are also presented, such as methyl formate, HFOs, and saturated HFCs that offer some improvements but require further development and commercialization. The overall message is an urgent need to phase out HCFCs due to environmental concerns while pursuing the most viable and sustainable alternative blowing agent options.