The Straits Times US environment agency to announce sharp limits on powerful greenhouse gases The EPA aims to reduce the production and importation of hydrofluorocarbons, which are used in refrigeration and air-conditioning, over the next 15 years.PHOTO: AFP Updated3 hours ago https://str.sg/JtpW They can read the article in full after signing up for a free account. Share link: Or share via: Sign up or log in to read this article in full Sign up All done! This article is now fully available for you Read now Get unlimited access to all stories at $0.99/month for the first 3 months.