Carbon offsetting is the practice of compensating for greenhouse gas emissions by funding projects that reduce or remove emissions elsewhere.
[noun] These projects may include reforestation, renewable energy generation and similar initiatives. While useful, offsetting should complement—rather than replace—efforts to reduce emissions at the source.
Example: A company financing a wind farm to balance the CO₂ generated by its business travel is engaging in carbon offsetting.
From ECONYL® Blog
LEED®
LEED® (Leadership in Energy and Environmental Design) is a globally recognized green building certification system developed by the U.S. Green Building Council.