Why do so many of us get so fat? the answer appears obvious. âThe fundamental cause of obesity and overweight,â the World Health Organization says, âis an energy imbalance between calories consumed and calories expended.â Put simply, we either eat too much or are too sedentary, or both. By this logic, any excess of caloriesâwhether from protein, carbohydrate or fat (the three main components, or âmacronutrients,â in food)âwill inevitably pack on the pounds. So the solution is also obvious: eat less, exercise more. The reason to question this conventional thinking is equally self-evident.
The 1972 act introduced the National Pollutant Discharge Elimination System (NPDES), which is a permit system for regulating point sources of pollution. Point sources include: 1  industrial facilities (including manufacturing, mining, oil and gas extraction, and service industries).ountaintop removal mining requires a section 404 permit when soil and rock from the mining operation is placed in streams and wetlands (commonly called a valley fill). Pollutant discharges from valley fills to streams also requires an NPDES permit.
1 A number of types of discharges that meet the definition of a âpointâ source are not required to obtain an NPDES permit because of either statutory (congressional) or administrative (EPA) exemptions. These include the following:  Abandoned mines on nonfederal lands (state, local, private)