The Chagos Islands deal does give sovereignty to Mauritius in return for a lease on Diego Garcia, the island used for a major UK-US airbase, although this is 99 years rather than 100. The part about Indigenous people is more off piste. The Chagos islanders have been exiled since Diego Garcia was forcibly cleared more than 50 years ago to make way for the base.
The super project in southern Nevada was set to cover set to cover 185 sq miles a footprint close to the size of Las Vegas and include seven solar projects proposed by different companies, including NextEra Energy Resources, Leeward Renewable Energy, Arevia Power and Invenergy. Together, the network of solar panels and batteries was set to produce 6.2 gigawatts of energy, or enough to power nearly 2m homes.