or rehabilitated commercial or residential properties that earn a minimum of LEED Certified. In Nevada, construction materials for a qualifying LEED building are exempt from local taxes. Pieces of construction that are deemed 'inseparable parts', such as concrete or drywall, qualify. Maryland's High Performance Buildings Act (2008) requires all new public construction and renovations greater than to meet LEED Silver standard or two Green Globes. Between 2009 and 2014, the state is required to fund half of the required additional cost for public school construction or renovation to attain that standard. Michigan is considering tax-based incentives for LEED buildings. In June 2013, USGBC announced a promotion called LEED Earth that refunds LEED certification fees to the first LEED-certified project in a country that doesn't have one. Notable certifications The Philip Merrill Environmental Center was the first building to receive a LEED-Platinum rating, version 1.0. It was recognized as one of the "greenest" buildings constructed in the U.S. in 2001 at the time it was built. Sustainability issues ranging from energy use to material selection were given serious consideration throughout design and construction of this facility. The first LEED platinum-rated building outside the U.S. is the CII Sohrabji Godrej Green Business Centre (CII GBC) in Hyderabad, India, certified in 2003 under LEED version 2.0. Pittsburgh's David L. Lawrence Convention Center was the first Gold LEED-certified convention center and largest "green" building in the world when it opened in 2003. It earned Platinum certification in 2012, becoming the only convention center with certifications for both the original building and new construction. In Pittsburgh, the visitor's center of Phipps Conservatory & Botanical Gardens received a Silver certification, its Center for Sustainable Landscapes received a Platinum certification and fulfilled the Living Building Challenge for net-zero energy, and its greenhouse facility received Platinum certification. Also in Pittsburgh, Sota Construction Services' corporate headquarters, which features a super-efficient thermal envelope using cob walls, a geothermal well, radiant heat flooring, a roof-mounted solar panel array, and daylighting features. It earned a LEED Platinum rating in 2012 with one of the highest scores by percentage of total points earned in any LEED category, making it one of the top ten greenest buildings in the world. The Cashman Equipment building is the first construction equipment dealership to receive LEED certification. It is the largest LEED industrial complex in Nevada. Caterpillar corporate has rewritten their development guidelines for new facilities based