Sustainability Indicator: 70% Urban
This month's indicators:
$5 trillion: global investment in clean energy by 2020 to contain climate change.
$409 billion: worldwide government subsidies given to the fossil-fuel industry in 2010.
$66 billion: global subsidies for renewable energy in 2010.
$90 billion: wealth of the richest 70 members of China's National People's Congress.
$7.5 billion: wealth of all 660 top officials in the three branches of U.S. government.
134: earthquakes last year in central U.S., where seismic activity is linked to fracking.
21: average annual earthquakes in central U.S. in the three decades prior to 2000.
13 million tons: CO2 emissions saved by Wal-Mart's recycling and waste-reductions last year.
2.3 million: cars needed to be taken off the road to reduce CO2 emissions by 13 million tons.
240 gigatons: mass lost from the Greenland ice sheet each year from 2002 to 2012.
0.7 millimeters: annual sea level from the melting Greenland ice sheet.
61 percent: amount of Spain's electricity demand that was met by wind power on April 16.
396.53 parts per million: carbon dioxide in the atmosphere as of April 14.
350 parts per million: maximum CO2 before environmental damage from climate change.
130 billion pints: beer consumption expected in China in 2016.
29%: increase in China's 2016 beer consumption over 2011.
$1 trillion: worldwide investments in renewable energy through 2011.
82%: decline in solar panel prices since August 2009.
117,182: electric cars and hybrids vehicles sold globally last quarter.
49%: rise in electric and hybrid sales compared with the same quarter a year ago.
$260 billion: global investment in renewable energy in 2011.
$54 billion: investment in renewables in 2004.
73.3 gigawatts: additional global wind and solar capacity planned for 2012.
55 million: U.S. homes powered by 73.3 gigawatts.
2 billion: people expected to be added to the Earth's population by 2050.
80%: additional energy capacity needed for anticipated energy needs in 2050.
15,000: temperature records broken in the U.S. in March.
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