Recreational cannabis grow rooms, outfitted with 24-hour LED grow lights, are becoming common in U.S. cities where marijuana farming is legal. Ben McLeod/Getty Images Not a lot of legitimate scientific research involves growing marijuana plants in a garage, but that's what it took for William Vizuete, associate professor of environmental sciences and engineering at the Gillings School of Global Public Health at the University of North Carolina, to begin to untangle the problem of whether the booming cannabis industry in Colorado is affecting air quality in Denver. As more states legalize marijuana for medicinal and recreational use (as of 2018, 33 states and Washington D.C. have decriminalized the drug in some form or fashion), studies suggest marijuana farming impacts the environment in a variety of ways, from wildlife habitat fragmentation to its extreme energy and water requirements. But until Vizuete and a Ph.D. student went to Denver and bought and monitored 12 marijuana … [Read more...] about How a Booming Legal Marijuana Industry Could Harm Air Quality
Automobile industry average financial ratios
After signing the Wall Street reform bill they co-wrote into law on July 21, 2010, President Barack Obama congratulates Sens. Christopher Dodd and Barney Frank. Win McNamee/Getty Images On July 15, 2010, the U.S. Senate voted 60-39 to approve the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. The bill -- representing the most sweeping financial restrictions since the Great Depression -- gives Congress the right to break up corrupt banks and other financial institutions, eliminates proprietary trading, and ends the practice of bailing out banks in trouble. In other words, it increases oversight of the financial industry in an effort to prevent the kinds of practices that many believe have led to -- or worsened -- the financial crisis. But what about the average Joe (or Jane) with 2.5 kids, a car and a mortgage? After all, regular people have also felt the effects of everything from corrupt lending practices to policies that work in businesses' favor while … [Read more...] about What’s the Bureau of Consumer Financial Protection?
Compression Ratio and Detonation For those who either never learned it or have forgotten, it's useful to know: Cars' internal combustion engines all function pretty much the same way. The vast majority of cars have four-stroke gas engines; each stroke, or compression stroke, is when a cylinder full of gas and air is compressed into a dramatically smaller volume before it is ignited with a spark plug [source: Arman]. To be more specific, a piston compresses the fuel and air mix in the combustion chamber of the engine. And the so-called compression ratio -- and each engine has its own ratio -- refers to just how much of that fuel and air combination the piston compresses. "In a four cylinder, 2-liter engine, each cylinder would have a 500 cc capacity," says John Nielsen, director of approved auto repair with the American Automobile Association (AAA). "As the piston moves down the cylinder, it draws in 500 cc of air and fuel. The valves close and the piston moves up, compressing the … [Read more...] about Compression Ratio and Octane Ratings: What You Need to Know
If you watch the news, you hear all the time about the Dow Jones Industrial Average and other averages like the S&P 500 or The Russel 2000. These are "market averages" designed to tell you how companies traded on the stock market are doing in general. The Dow Jones Industrial Average is simply the average value of 30 large, industrial stocks. Big companies like General Motors, Goodyear, IBM and Exxon are the kinds of companies that make up this index. See Dow Jones & Company for details on how the average is calculated. See The Investment FAQ for a list of the companies in the average. The thing to understand is that the Dow Jones Industrial Average is nothing magic -- someone has chosen 30 companies and averaged their values together by following a specific formula. That's all it is. There are all sorts of averages out there. The S&P 500 is the average value of 500 different large companies. The Russel 2000 tracks the average of 2,000 smaller companies. And there are … [Read more...] about What is the Dow Jones Industrial Average?
While many home sites have sat virtually untouched during the construction bubble, large and small green construction jobs have thrived. See more pictures of home construction. AbleStock.com/Thinkstock Unless you've been in a coma for the past three years, you've probably heard something about the real estate bubble that burst in the late 2000s. The real estate bust affects all sectors of the economy, from attorneys to home decorating, but few areas have been quite as directly affected as the construction industry. As the country -- and the world -- continues to dig its way out of the Great Recession, construction jobs and contracts remain below the peak from the boom years of 2005 and 2006. But it hasn't been all doom and gloom. Throughout the recession, one sector of the construction industry has consistently shown signs of growth: green building. Through the darkest days of the financial collapse, green jobs have proven to be somewhat recession-proof. That's partly because … [Read more...] about Did any part of the construction industry escape the bubble burst?