Environment
Today’s cities don’t have walls for protection like ancient ones, but they are separate from less urban and rural land. Most goods that city-dwellers purchase are brought in from rural farms and manufacturers. There is an active community of urban gardeners and landscape architects who are trying to bring more of the “country” back into the city. And for good reason.
You may have heard the term “carbon sequestration.” In its basic terms, it refers to keeping and returning carbon to the soil. Since carbon is an element, how and why should this be done?
As most kids know, a big pile of mud can be a load of fun.
But not for farmers. Muddy fields mean too much water. And too much water means crops might not grow well.
As the saying goes, an apple a day keeps the doctor away. But what’s the key to growing a quality apple?
Bioreactors are underground trenches filled with woodchips. They have been gaining traction as a tool to remove nitrogen from the water in agricultural settings. 
For years it’s been relatively easy to measure pollution from, say, a factory. At a factory, there might be just one pipe of waste to measure. Easy enough.
