An international agreement should be reached which sets
(1) an executable and enforceable framework for keeping Earth well within its 7 measurable planetary boundaries (currently including climate change, biosphere integrity, land-system change, freshwater use, biogeochemical flows, ocean acidification, and stratospheric ozone depletion)
(2) an executable and enforceable framework for the designation of at least 50% of the planet as a nature reserve and
(3) international protections, funding, and legal personhood to large swaths of wildlands like the Brazilian Amazon and Nile River, including rivers longer than 1,500 km and wildlands larger than 1,000,000 acres.
Source: Green Party