Top down and bottom up: two ideas often discussed in biology. Specifically, the idea that an organisms population is controlled by both bottom up controls (things like the amount of food around, temperature, freshwater availability) and top down controls (i.e., predation). 823 more words
Tags » Wastewater
Wastewater, on a global level, accounts for nine per cent of all anthropogenic methane emissions. Not only is wastewater emitting large amounts of methane, but does contain many kinds of contaminants, bacteria and chemicals such as phosphorus and nitrogen nutrients, harmful for both our environment and for human beings. 906 more words
Illegal discharge of wastewater is something taken very seriously in developed countries – but not in Hong Kong.
ASB Biodiesel, a HK$1.36 billion facility opened with much environmental fanfare by former Financial Secretary John Tsang in 2013, was found in May to be illegally discharging its wastewater into local storm drains. 308 more words
On October 20, 2017, Virginia’s Joint Legislative Audit and Review Commission (JLARC) released “Land Application of Biosolids and Industrial Residuals,” a 101-page report called for by the 2016 Virginia General Assembly (HJ 120, online at… 467 more words