Most natural ecosystems and heritage sites, both on land and in the sea, are at risk of being affected by climate change. They include: glaciers, coral reefs, mangroves, boreal and tropical forests, polar and alpine ecosystems, wetlands and grasslands. Examples of some sites so affected include the Kluane / Wrangell-St Elias / Glacier Bay / Tatshenshini-Alsek (USA and Canada), Huascarán National Park (Peru), Mount Kilimanjaro (United Republic of Tanzania), Ilulissat Icefjord (Denmark), the Belize Barrier Reef Reserve System (Belize), Waterton Glacier International Peace Park (USA and Canada).