President Obama Visits Largest Photovoltaic Plant In U.S. In Nevada

President Barack Obama signed the long-delayed legislation to implement energy efficiency in buildings. “Obama signed the bill into law Thursday in the Oval Office. He was surrounded by a bipartisan group of lawmakers.

The law aims to cut energy use in commercial buildings, manufacturing plants and homes.

Obama says he hopes it will lead to more progress on environmental issues. He says it’s an area where Washington could make a big impact and create jobs.” [US News/AP]

Four Amazonian tribes have united in opposition to the construction of hydroelectric dams in their territory as the Brazilian government ramps up efforts to exploit the power of rivers in the world’s biggest forest. “The Munduruku, Apiaká, Kayabi and Rikbaktsa released a joint statement on Thursday demanding the halt of construction on a cascade of four dams on the Teles Pires – a tributary of the Tapajós.

They say the work at the main area of concern – the São Manoel dam – threatens water quality and fish stocks. The site has already reportedly expanded almost to the edge of a nearby village, although the local communities say they have not been consulted as they obliged to be under national laws and international standards.” [The Guardian]

Amid widespread attempts to reduce New York’s environmental footprint, city officials on Wednesday weighed a City Council bill to reduce light use in many commercial buildings when empty at night.  “The environmental considerations are clear: reducing potentially wasteful energy use as part of the city’s bid to curb its greenhouse gas emissions.

The administration of Mayor Bill de Blasio has expressed support for passing a version of the bill, calling light pollution a citywide scourge for migratory birds and sedentary New Yorkers.” [The NY Times]