Which of the following offsets are most likely to be additional?

A city has already built a methane$-$capturing device in a landfill in TN$,$ and is now selling its offsets to recoup the cost

An NGO has already built solar panels in a remote area of Africa, and is now selling its offsets

An NGO has already reforested an area of the Amazon and is now selling the emissions reduction as offsets

An NGO is planning to reforest an area of the Amazon and