This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: To prevent the tipping point after which catastrophic environmental change will happen, what needs ... (Read 12 times)

audie

  • Hero Member
  • *****
  • Posts: 532
on: Jul 16, 2018
To prevent the tipping point after which catastrophic environmental change will happen, what needs to be done?
 
  A) Carbon dioxide emissions must be eliminated in the next two years.
  B) Global greenhouse gas levels must peak no higher than 450 ppm and start declining by 2015.
  C) All greenhouse gases need to immediately be reduced below their levels in 1990.
  D) Carbon dioxide emissions must not rise more than 800 ppm, double the levels in the atmosphere today.

Question 2

In general, the optimal population for harvesting
 
  A) the maximum sustainable yield is at about half of the carrying capacity of the population.
  B) the maximum sustainable yield is at about 90 of the carrying capacity of the population.
  C) a plant population is quite different from the optimal population for harvesting animals.
  D) any organism is independent of the carrying capacity of the environment.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kjohnson

  • Sr. Member
  • ****
  • Posts: 330
Reply #1 on: Jul 16, 2018
Answer to Question 1

B

Answer to Question 2

A


audie

  • Member
  • Posts: 532
Reply 2 on: Jul 16, 2018
Wow, this really help

emsimon14

  • Member
  • Posts: 344
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Observed change in surface temperature from 1901 to 2012 Observed change in surface temperature from 1901 to 2012
4 ways your breasts change after pregnancy "4 تغيّرات تطرأ على ثدييكِ ... 4 ways your breasts change after pregnancy "4 تغيّرات تطرأ على ثدييكِ ...
Hormonal change during ovulation and urinear cycles Hormonal change during ovulation and urinear cycles
Set-Point Theory Set-Point Theory
Decimal Values as They Relate to the Location of the Decimal Point Decimal Values as They Relate to the Location of the Decimal Point
If a graph has the following x-intercepts, which value of x is the instantaneous rate of change ... If a graph has the following x-intercepts, which value of x is the instantaneous rate of change ...
Video: The pH scale - Strong acids and Weak acids

For a complete list of videos, visit our video library