Lecture 4

Question 1

What is a pollutant?

Answer 1

Any chemical or material out of place or present at higher than normal concentrations and that has adverse affects on any organism.

Question 2

Particulates

Answer 2

Particulates (big ones) 2.5 um in diameter and small ones (less than <2.5 um) are both a concern.

Question 3

Big particulates come from

Answer 3

smoke, dirt, soil, sold, spores, etc.

Question 4

Small particulates

Answer 4

usually toxic organic compounds and heavy metals.

Question 5

Remediation:

Answer 5

1. ) Restoration
2. ) Rehabilitation
3. ) Reclamation

Question 6

Restoration

Answer 6

re-establishment of the original, pre-disturbance ecosystem.

Question 7

Rehabilitation

Answer 7

The establishment of an ecosystem that is comparable too, but not the as, the pre-disturbance ecosystem.

Question 8

Reclamation

Answer 8

Aims to return disturbed land to productive use.

Question 9

Traditional Biomass

Answer 9

us of agricultural by-products also removes nutrient from fields, reducing their fertility.

Question 10

Modern Biomass

Answer 10

Energy productions leads to displacement of food crops and the clearing and cultivation of land not previously used for export of plant products.

Question 11

Three categories of environmental concerns:

Answer 11

1. ) Catastrophic accidents
2. ) Nuclear weapons
3. ) Long-term storage of nuclear waste