This topic contains a solution. Click here to go to the answer

Author Question: What role does the Toxic Substances Control Act play in the hazardous-waste arena? What will be ... (Read 143 times)

rmenurse

  • Hero Member
  • *****
  • Posts: 513
What role does the Toxic Substances Control Act play in the hazardous-waste arena?
 
  What will be an ideal response?

Question 2

What are the major advantages and problems associated with using biotechnology in food production?
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

juwms

  • Sr. Member
  • ****
  • Posts: 337
Answer to Question 1

The Toxic Substances Control Act (TSCA) . . . requires that, before manufacturing a new chemical in bulk, manufacturers must submit a pre-manufacturing report' to the EPA in which the environmental and human health impacts of the substance are assessed (including those that may derive from the ultimate disposal of the chemical). Depending on the results of the assessment, the manufacturer may be required to test the effects of the product on living things. Following the results of the testing, a product's uses may be restricted or a product may be kept off the market altogether.

Answer to Question 2

The promise of genetically modified crops has beenlike the Green Revolutionto increase food production. Among other aims, the objectives of genomics (genetically modified food) are (1) to incorporate resistance to diseases and pests that attack important tropical plants, (2) to increase tolerance to environmental conditions, such as drought and high salt levels, which stress most plants, (3) to improve the nutritional value of commonly eaten crops (like the work with golden rice), and (4) to produce pharmaceutical products in ordinary plants (pharma' crops'). . . . Among the important environmental benefits of bioengineered crops are reductions in the use of pesticides, because the crops are already resistant to pests; less erosion, because no till cropping is facilitated by the use of herbicide-resistant crops; and less environmental damage associated with bringing more land into production, because the existing agricultural lands will produce more food.
Concerns about genetic engineering technology involve three considerations: environmental problems, food safety, and access to the new techniques. A major environmental concern focuses on the pest-resistant properties of the transgenic crops. With such broad exposure to the toxin or some other resistance incorporated into the plant, it is possible that the pest will develop its own resistance to the toxin more rapidly and thus render it ineffective as an independent pesticide. Another concern is the ecological impact of the crops. For example, pollen from Bt corn (resistant to the corn borer) disperses in the wind and can spread to adjacent natural areas where beneficial insects may pick it up and be killed by the toxin. A third environmental concern arises because genes for herbicide resistance or for tolerance to drought and other environmental conditions can also spread by pollen to wild relatives of crop plants, possibly creating new or super' weeds. Food safety issues arise because transgenic crops contain proteins from different organisms and might trigger an unexpected allergic response in people who consume the food. The problems concerning access to the new technologies relate to the developing world. For the first few years, almost all genetically modified organisms were developed by large agricultural-industrial firms, with profit as the primary motive. Accordingly, farmers have been forbidden by contract from simply propagating the seeds themselves and must purchase seeds annually. Farmers in the developing countries are far less able to afford the higher costs of the new seeds, which must be paid up front each year.




rmenurse

  • Member
  • Posts: 513
Reply 2 on: Jul 15, 2018
:D TYSM


ultraflyy23

  • Member
  • Posts: 312
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

For a complete list of videos, visit our video library