TRAVERSE CITY, Mich. (AP) — The U.S. and Canada are preparing to approve an updated version of a 40-year-old pact that commits both nations to protecting the Great Lakes.

The Great Lakes Water Quality Agreement was first signed in 1972 and amended most recently in 1987. It identifies dozens of highly contaminated areas needing cleanups and calls for reducing toxic pollution and levels of nutrients that cause algae blooms.

Despite progress in those areas, officials and activists say the lakes face new threats. The revised agreement will include sections on invasive species such as Asian carp, restoring native species and habitat, and preparing coastal communities for climate change.

U.S. Environmental Protection Agency chief Lisa Jackson and Canada’s environment minister, Peter Kent, are to sign the new deal Friday at the Canadian embassy in Washington, D.C.