Part of the design stage for any biggish project in Europe, these days, is an Environmental Impact Assessment.
These are now required by legislation and so provide much work for advisor and consultant companies, who employ environmental engineers.
The scope is huge and may include, a new road, shopping centre, supermarket, football stadium, dam, waterworks or anything in the built environment.
Of course there is also much work generated, performing similar assessments after the event for alreading existing installations.
On the practical side, the street cleansing & waste disposal industries are another example of Env E.
A design task here might be creating suitable protection at a landfill site to prevent unwanted waste chemicals etc leaching into local groundwater or just the local ground.
Another similar task might be to control the aerial discharge of factories.
Yet another area of activity is for Env Engineers play a part in the design of manufactured goods, so that eventual disposal is considered at design stage. This might mean influencing the materials or construction/disassembly techniques.
Society is moving in this direction with legislation on more and more products.
So, although the environmental effect of what we are doing has always played some part in engineering, this part will grow in future.
Environmental engineering is new as a distinct discipline so much of the future will depend on what its practioners make of it.
go well