Species Loss and Environmental Problems
Paul Ehrlich, best known for his work on population growth, observes that species and diversity loss is the most irreversible of our environmental
Series: Environmental Science
Subject: environmental science
Transcript: and so on And i think most of my colleagues would agree that It is the most irreversible of our environmental problems And one that we should be paying
Physical Treatment Technologies: Flocculation
The use of gravity is often the most economical method of separating solids from a liquid. In a sedimentation tank, heavier particles sink to the bottom and are collected in a trough. When particles, like clay, are too small to settle on their own...
Series: Environmental Science
Subject: environmental
Respecting Planet Earth
Former Sierra Club president David Brower talks about some of the ways humans have damaged planet Earth in the quest for material possessions and wealth. He invokes Henry David Thoreau's sentiment that there's no use for a house if you haven't got a...
Series: Environmental Science
Subject: environmental science
Running Out of Energy
.Ehrlich, the biggest threat posed by reliance on such fuels is not running out of them but, rather, their negative environmental impact.
Series: Environmental Science
Subject: environmental science
Transcript: , The environmental problems that are created by it, The most prominent one right now being the amount Of carbon dioxide that's spewed into the atmosphere
Over-Consumption
Paul Ehrlich, best known for his work on population growth, cites over-consumption as one of the principle threats to the environment.
Series: Environmental Science
Subject: environmental science
Physical Treatment Technologies: Centrifuges and the Baghouse
Centrifuges, such as the baghouse, possess several environmental advantages over surface filtration. As an enclosed unit, it can contain volatile or
Series: Environmental Science
Subject: environmental
Transcript: here. [ narrator ] centrifuges possess several environmental advantages over surface filtration. as an enclosed unit, volatile or toxic fumes and mists
Thermal Treatment Technologies: Municipal Waste and Reciprocating Grate Systems
One of the thermal treatment technologies that strives to make the best use of time, temperature and turbulence is the reciprocating grate incinerator, used by nearly 250 municipalities.
Series: Environmental Science
Subject: environmental
Transcript: , uh, Impinge upon people's health and safety... And have any sort of negative environmental consequences.
What You Don't Know...: Environment, A Crucial Factor in Health, The
The environment is a crucial factor in the health of an individual. Although regulations have reduced environmental pollution, many chemicals are
Subject: environmental regulations
Transcript: decades have greatly reduced environmental pollution. [gibbs:] our rivers don't catch on fire anymore. We don't have big, black plumes in most communities
Chemical Treatment Technologies: Chemical Principles
Chemicals provide the building blocks for everything in our physical world. Uncontrolled, their misuse can result in tragedy. As a safeguard against potential dangers, treatment processes are being implemented to mitigate or eliminate the harmful ...
Series: Environmental Science
Subject: environmental
Chemical Treatment Technologies: Oxidation and Reduction: An Overview
While some metals can be readily precipitated, others cannot be until they are reduced. The clarified water resulting from these processes can then be discharged into a municipal wastewater treatment system.
Series: Environmental Science
Subject: environmental