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Lightbulbs have changed quite a bit lately. Compact fluorescent lamps were introduced as highly efficient alternatives to traditional bulbs before 100, 75, 60 and 40-watt incandescent lightbulbs are phased out of production by 2014.
The good news is that the bulb is so efficient that if every 60-watt incandescent in the country were replaced, $3.9 billion and 20 million metric tons of carbon emissions would be saved in one year.
The average American throws about 40 percent of their food away every year, and nearly 100 cities have launched composting programs to try and keep it out of landfills.
Curbside composting has spread across the country from uber-green San Francisco, which started their program 15 years ago and now collects more than 600 tons of compost daily.
Of the 250 million tons of trash created in the U.S. in 2010, 34 percent of it was diverted to composting or recycling programs, according to the EPA.
Single-use plastic bags have been outlawed in a few major cities across the country like Seattleand San Francisco, and others like Washington D.C. have instituted a per-bag tax. China imposed a nationwide ban in 2008.
But people should be wary and keep grocery bags clean – a 2012 study found a connection between reusable bags and a spike in E. coli infections.
The cost for renewable energy continues to falland is starting to become much more economically competitive with fossil fuels. New reports from the International Renewable Energy Agency show the cost of solar falling more than 60 percent in the past few years alone.
Increasing competition has helped push the price down, particularly with solar as U.S. and European manufacturers struggle to keep up with the pricing of Chinese solar panels.